bad lcd panel symptoms made in china

The difference between a LED TV and a LCD TV is that they are both LCD TV’s except one has LED stripes and the other has CCFL Backlights- (Florescent Tubes). I used a Philips Magnavox Emerson LG TV when testing these repaird, but they should work on other TV brands that are similar. Before you do any Repair, check to see if you are still under warranty, or are covered by a recall of your TV!!

If your Plasma or LCD/LED or CCFL/LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it *may* need some new capacitors in the power supply board or a replacement board

If the TV is still locked and will not respond to any commands from the front panel control buttons or the remote control unit, it is apparently locked in a failure or diagnostic mode, and would probably have to be diagnosed and repaired by a reputable TV repair facility. Good luck.

If it is a thin vertical line that appears on certain video resolution/image then it is normal and is indicated in the users manual under troubleshooting. If the line is almost half the screen, it could be a problem with the cable connection between the LCD panel and logic board, or the LCD panel itself. Try reseating the cable first if it’ll solve the problem. I’ve done similar issue in the past. Reseating the cable worked for a couple of months till eventually the LCD panel is the problem. Replacing the LCD panel is quite costly and impractical.

If the lines are there all the time or intermittent but in the same location it is an indication of a bad panel. The panel driver can also be the cause of this symptom.

If the lines/bars are across the OSD Menu, and all the video signal inputs also same result, that means the TV LCD Panel is defective Most of the time this symptom is caused by a bad LCD Panel 95%. You can try refitting LVDS Cable or replacing Main Board capacitors or replacing Main Board—5%

Bad news unfortunately, their are two possible causes for what you have described, one would be a fault with the picture drive pcb ( Power Control Board ), and the other is physical damage to the LCD cell matrix, (screen).

There’s videos on how to fix this. It has to do with putting foam, in between panel frame and screen, which applies pressure to solder joints, which then completes the circuit- Contact my10cents, for better explanation.

Is the OSD menu affected as well? If yes then possibility could be the LCD Panel or the t-con board. Since you have replaced the t-con board then possibility is the LCD panel. There could be also a possibility of mainboard where upgrading the firmware could restore the picture. If the OSD menu is not affected then the LCD panel is good.

If the lines are across the OSD menu then chances is very high the LCD panel is the cause of the problem otherwise it can be due to bad T-con board or even Mainboard. Have you tested on the OSD menu to see if the lines are really across the menu?

White Lines– There are several possibilities that can cause white lines on an lcd screen. One would be high temperature on the logic board. Logic board drives the LCD panel and when it overheats can cause this display problem. One solution would be to clean the vent holes around the TV. One possibility that I have experienced myself servicing is a bloated capacitor on the power supply board. The worst possibility is a defective LCD panel, which is costly to repair, and sometime more practical to buy a new TV set.

There are several problems that could cause this problem. It could be the connection from the T-Con board to the panel, try wiggling these cables around and see if the picture comes up even for a second. The Mainboard or it’s cables are not the issue in my opinion. The isdsue is either going to be a bad capacitor, faulty output from the power supply to the T-Con board, a bad connection from T-Con to panel, or the T Con or the panel itself are faulty.

It could be the connection from the T-Con board to the panel, try wiggling these cables around and see if the picture comes up even for a second. The Mainboard or it’s cables are not the issue in my opinion. This is due to either a bad capacitor, faulty output from the power supply to the T-Con board, a bad connection from T-Con to panel, or the T Con or the panel itself are fault. Also, it’s possible the A/V receiver’s Video On feature was turned off by an electrical surge or something else.Turn the Video feature back to On and suddenly that bad blue screen was gone.

Now we need to know if PSU Board has all the correct output voltages. This means checking the secondary side output voltages of Power Board. Probable causes are the Power Supply, the T-Con board, Main Board or the LCD panel itself has failed.

You will have to go into the TV and check for capacitors or burn marks or cracked solder around the pins–Main board could be IC’s, or regulators–Panel–Disconnect panel and see if your TV stay’s on—

The flashing green light indicates a fault on the power board inside your TV. This will be due to a faulty component like a capacitor or voltage regulator. Faulty electrolytic capacitors on the power board are the most common cause of this problem. These capacitors will often leak and stop working as the TV set gets older,but could also be caused by the Main Board or the inverter board. (LCD TV ONLY) So we will have to take a look inside and maybe do some circuit testing and a visual of your boards-

In a dark room take a flashlight and at an angle shine it on the screen and see if you can see any movement. If you can see movement or see your menu then its backlight failure. If totally black screen with sound then its T-Con board. So if you see movement on a led screen, then it’s your LEDs inside the panel. If on a LCD TV you see movement and lamps are not turning on, replace inverter. If with a LCD TV your lamps turn on, with no picture replace T-Con Board.

Plasma is the most durable in terms of panel failure. LED/LCD is terrible for panel failure. (But every model gets bad apples. Samsung LED/LCD panels die frequently. LG panels are a lot more reliable.) Overall I’d say plasma is more reliable, and even if it fails, in most cases plasma is repairable, LED/LCD is expensive to repair and often difficult to troubleshoot.

A blurry image on a high-definition LCD TV is typically the result of a mismatch between the TVs resolution capabilities and the resolution of the signal that is coming from connected devices, such as a DVD player or satellite TV receiver. Typically, blurry pictures result when a peripheral device connects to the TV through non HD cables and jacks.

Ever had your TV showing nothing but a black screen even if the audio was working? Unfortunately, that’s a common issue with low/middle-end LCD/LED TVs these days… Even more frustrating, this issue often comes from a rather tiny and cheap component that can be easily replaced. Most common issues are:

That implies disassembling the TV to access the backlight which is between the LCD screen in the front and the boards in the rear. In my case, with a Samsung F5000, I had to process as follows:

First we have to remove the back housing to reveal the boards (from left to right: main board, T-CON, power supply) and disconnect the LCD panel from the T-CON board.

Note: Older TVs have neon tubes for backlight, which is thicker and less exposed to this kind of failure. LED backlight is the most common thing these days, but do not mistake an LED TV with an OLED TV. The first one is a classic LCD panel with a LED backlight, whereas the second is an OLED panel that doesn’t need any backlight as it is integrated in each pixels (making the spare parts much more expensive by the way).

There might be a lot of other root causes for similar symptoms, a black screen often looks like something very serious and therefore expensive to repair, but this case is the perfect example that taking some time to look for the root cause can sometime lead to a good surprise: here a 1$ fix!

Troubleshooting CRTs versus LCDs begins with similar steps, but diverges due to the differing natures of the two display types. The first troubleshooting steps are similar for either display type: power down the system and display and then power them back up; make sure the power cable is connected and that the outlet has power; verify that the signal cable is connected firmly to both video adapter and display and that there are no bent pins; verify that the video adapter is configured properly for the display; try the problem display on a known-good system, or try a known-good display on the problem system; and so on. Once you"ve tried the "obvious" troubleshooting steps, if the problem persists, the next step you take depends on the type of display. The following sections cover basic troubleshooting for CRTs and LCDs.

Check the obvious things first. Verify that the CRT is plugged in (and that the receptacle has power), the video cable is connected to the video card, the computer and CRT are turned on, and the brightness and contrast settings are set to the middle of their range. If none of these steps solves the problem, your CRT, video card, or video cable may be bad. Check the suspect CRT on a known-good system or a known-good CRT on the problem system.

The CRT may need to be degaussed. A CRT that sits in one position for months or years can be affected even by the earth"s very weak magnetic field, causing distortion and other display problems. Exposing a CRT to a strong magnetic field, such as unshielded speakers, can cause more extreme image problems. Many modern CRTs degauss themselves automatically each time you cycle the power, but some have a manual degauss button that you must remember to use. If your CRT has a manual degauss button, use it every month or two. The degaussing circuitry in some CRTs has limited power. We have seen CRTs that were accidentally exposed to strong magnetic fields, resulting in a badly distorted image. Built-in degaussing did little or nothing. In that case, you can sometimes fix the problem by using a separate degaussing coil, available at RadioShack and similar stores for a few dollars. We have, however, seen CRTs that were so badly "magnet burned" that even a standalone degaussing coil could not completely eliminate the problem. The moral is to keep magnets away from your CRT, including those in speakers that are not video-shielded.

If your LCD displays no image at all and you are certain that it is receiving power and video signal, first adjust the brightness and contrast settings to higher values. If that doesn"t work, turn off the system and LCD, disconnect the LCD signal cable from the computer, and turn on the LCD by itself. It should display some sort of initialization screen, if only perhaps a "No video signal" message. If nothing lights up and no message is displayed, contact technical support for your LCD manufacturer. If your LCD supports multiple inputs, you may need to press a button to cycle through the inputs and set it to the correct one.

Unlike CRTs, where increasing the refresh rate always reduces flicker, LCDs have an optimal refresh rate that may be lower than the highest refresh rate supported. For example, a 17" LCD operating in analog mode may support 60 Hz and 75 Hz refresh. Although it sounds counterintuitive to anyone whose experience has been with CRTs, reducing the refresh rate from 75 Hz to 60 Hz may improve image stability. Check the manual to determine the optimum refresh rate for your LCD, and set your video adapter to use that rate.

First, try setting the optimal refresh rate as described above. If that doesn"t solve the problem and you are using an analog interface, there are several possible causes, most of which are due to poor synchronization between the video adapter clock and the display clock, or to phase problems. If your LCD has an auto-adjust, auto-setup, or auto-synchronize option, try using that first. If not, try adjusting the phase and/or clock settings manually until you have a usable image. If you are using an extension or longer than standard video cable, try connecting the standard video cable that was supplied with the display. Long analog video cables exacerbate sync problems. Also, if you are using a KVM switch, particularly a manual model, try instead connecting the LCD directly to the video adapter. Many LCDs are difficult or impossible to synchronize if you use a KVM switch. If you are unable to achieve proper synchronization, try connecting the LCD to a different computer. If you are unable to achieve synchronization on the second computer, the LCD may be defective. Finally, note that some models of video adapter simply don"t function well with some models of LCD.

Not all analog video cards synchronize perfectly with flat panels. The gray Shutdown screen exaggerates the problem, so don"t worry if very tiny movements are visible after you"ve adjusted clock and phase as well as possible. After you"ve set the clock and phase controls for the best image possible on the gray screen, cancel Shutdown and the image should be optimized.

Your video card is supplying a video signal at a bandwidth that is above or below the ability of your LCD to display. Reset your video parameters to be within the range supported by the LCD. If necessary, temporarily connect a different display or start Windows in Safe Mode and choose standard VGA in order to change video settings.

This occurs when you run an LCD at other than its native resolution. For example, if you have a 19" LCD with native 1280x1024 resolution but have your display adapter set to 1024x768, your LCD attempts to display those 1024x768 pixels at full screen size, which physically corresponds to 1280x1024 pixels. The pixel extrapolation needed to fill the screen with the smaller image results in artifacts such as blocky or poorly rendered text, jaggy lines, and so on. Either set your video adapter to display the native resolution of the LCD, or set your LCD to display the lower-resolution image without stretching the display (a feature sometimes referred to as display expansion), so that pixels are displayed 1:1, which results in the lower resolution using less than the entire screen.

This is a characteristic of LCDs, particularly older and inexpensive models, caused by defective pixels. Manufacturers set a threshold number below which they consider a display acceptable. That number varies with the manufacturer, the model, and the size of the display, but is typically in the range of 5 to 10 pixels. (Better LCDs nowadays usually have zero dead pixels.) Nothing can be done to fix defective pixels. Manufacturers will not replace LCDs under warranty unless the number of defective pixels exceeds the threshold number.

Some people claim that leaving the unit powered off for a day or two will "erase" a persistent after-image. Others suggest leaving a neutral gray screen (like the one used for phase adjustment) up on the screen to "equalize" the display. I dunno. FWIW, I"ve seen this problem on older Samsung panels but never on the Sony or NEC/LaCie panels I use.

Again, this is a characteristic of LCDs, particularly older and inexpensive models. The after-image occurs when the display has had the same image in one place for a long time. The after-image may persist even after you turn the display off.

Transistor-based pixels in an LCD respond more slowly than the phosphors in a CRT. The least-expensive LCDs exhibit this problem even with slow image movement, as when you drag a window. Better LCDs handle moderately fast image movement without ghosting, but exhibit the problem on fast-motion video. The best LCDs handle even fast-motion video and 3D gaming very well. The only solution to this problem is to upgrade to an LCD with faster response time.

Gm I have a proscan plcd3717A tv. It comes on for a while and shut off. 37 LCD tv at school tuner. S/n a1212089790001040. I changed the power supply board. But still doing the same thing. Should I change the main board then.

Hi my 40inch LCD TV comes on on standby then I press the button and the light turns blue. There is no pic or lights on the screen and also no sound. Model no,m40/57g-GB-ftcu-UK. Product code ,um40d57bftcug107, serial no, 105571 03650. Thanks

Have 32″ Philips LCD TV. Was watching it while it was sitting on the carpeted floor and it got knocked forward. It didn’t hit hard, the picture is still perfect but now it is only Black and White (no color). I hooked up another TV to the source and it’s color.

I have here two Samsung LCD 32 inch model LA32D403E2 that has tiny horizontal lines but the second one will show very well for about five to ten minutes and start pouring white dews on the screen.

My two year old threw a toy at our 60 inch Samsung LCD tv. We have sound but no picture. There is no visible external damage, but where it was hit there are thin vertical rainbow stripes about 4 inches tall and wide. Trash? Thanks for any help you can provide.

I have a jvc lcd tv my daughter stuck a butter knife between the black plastic edge and the tv screen and bow there is a black spot where the knife was and a small thin horizontal white lone and a little thicker vertical pinkish line the screen is not cracked just black spot and lines how can I fix this?

My 3yr old son threw a plastic toy into the screen of my 60inch led lcd 3d tv now theres vertical and horizontal line in the middle part where the toy hit do you think its as good as gone?

I have an lg 55lv5500 LED LCD. I have power, sound and picture. However, the picture has vertical lines that are discolored over the whole screen (blacks are green, etc.). I have taken off the back and when I unplug the smaller LVD cable connected to the left of the TCon board, the picture clears but every other vertical line is black (meaning the vertical lines that are displayed when I do this appear to be the correct color). Is the LCD or the TCon board bad? Suggestions on how to further diagnose the problem? While I wasn’t present, my wife who was watching at the time said she heard a “pop” when the problem originated.

If your LG TV has vertical lines that are changing colors and you heard a “popping” noise while watching the TV, then this is most likely the T-con board (Timing Control Board) has a bad cap or another board has a capacitor on it that is bad. Check to see if you can find an obvious sign of a bad cap on any board. If so, replace the cap. Also, check to be sure all ribbon cables are connected and they are not damaged. If you cannot find a popped cap, then the T-con is most likely causing your issue from what you have explained. As long as the LCD panel is not cracked or broken, then a board or bad cap is causing the issue.

FYI – The T-CON board is the part of the LCD screen, it relays messages between the device’s processor and the display. The T-CON board synchronizes different parts of the screen with the info it gets from the processor. If the T-CON board malfunctions then the timing between parts of the board is disrupted and this leads to both horizontal and vertical lines that will display on the screen. It can also cause pixelation issues on your TV screen.

The colored lines and horizontal and vertical lines issue with your Samsung TV could be caused by a cracked screen. If the screen is not cracked, it could be a bad inverter, bad ccfl, etc. You may also have bad capacitors on the main board. Check the main board and check the capacitors for bulging.

If a simple tap on the side of the TV fixes the problem… you may just have a loose ribbon connection inside the TV. If the distortion on the screen changes, it is most likely not the screen but a cable or board in the TV. You can also check what connects to the glass to see if that is the issue. If keeping the TV on for a period of time fixes the issue, that could be a signal a board is bad. Safely open the tv up and check to see what may be an obvious sign of the issue. Check for loose cable, popped caps, burnt boards…etc.

I have a HiSense flat LCD, model number 50K610. The screen got hit on the bottom right corner and now it has lines going up it. I am wondering where I can order a new screen at?

My TV dropped on the floor a few months back, and now its messed up, has a big spider crack in it, kind stretches across the TV but not too bad, a few spots are just black, the rest have vertical lines of different colors. You can’t feel the cracks on the outside, and you can still kind of see the background image but its still pretty jacked up. Please help!

A 40 inch screen replacement for one of the low end Sanyo TVs would cost as much as the TV. Usually a screen replacement makes sense if your TV is over $1500 as the screen cost will not be over the cost of the TV, but a cheap HDTV replacement screen will be too expensive to make financial sense. Buying a new TV will be your best bet. Your TV may also have internal damage, meaning a circuit board could be bad since it fell over. So even if you replaced the screen, you may still have issues. Sell it on Craigslist for $50 dollars as replacement parts for someone who has the same TV and may need the stand or similar.

It will cost more to fix the screen than a new LCD TV. If you really want to check around look for screens on eBay. OR… Go on Craigslist for the same busted TV but with a good screen and swap it out.

Is the frame of the Toshiba TV cracked or is it for sure the screen? Did it fall? Something hit it? How bad is the crack? Can you watch TV or is there vertical or horizontal lines showing? If so, what color are the lines and how wide are they?

I recently bought a Samsung 65″ curved 4k TV (JS9000) and the screen received a somewhat deep vertical scratch near the top of the screen. About 3/4 – an inch long. Not an actual crack and no other problems with the picture, but it’s annoying because I know it’s there and the TV is less than a month old. And expensive. If I look closely, the pixels still seem to work, but the outer surface has been removed where the scratch is. Does anyone fix curved panels yet, or am I just going to have to live with it?

If the picture is fine but there is a small scratch on the screen, there is not much you can do. There are screen scratch repair kits but may not work properly if applied to an LCD or LED screen. Check YouTube for ways to remove scratches and marks from flat screen TVs.

May be an issue with the plasma gas or screen itself. This type of issue can happen on plasma TVs. Do you smell any type of burning smell? If picture shakes, you may have a bad board or a loose ribbon cable inside the TV.

Our Vizio E472VL was working fine until recently the picture was replaced by about 4 inch narrow band of vertical lines. I thought this might be the ribbon cables connecting the main board to panel but now not sure. I press on the top of the cables to improve connection and the band will widen, change color or move around; however I never get any picture not even the menu. Therefore, I am at a total lost on what the problem might be. Any suggestions? Thanks in advance – Bill

I have an LG LCD. Light horizontal lines just started to appear. No damage visible, mounted to a wall closer to the ceiling. Happens more visibly when showing greens or blues, but seems to fade in and out. Can you tell me what the problem might be, and a possible solution. Thank you.

I have a Sanyo TV DP46849. When you turn it on you get a white screen with thin color vertical lines. You see some of the lines start getting lighter and lighter and then go white. There is no sound before this happened the right side of screen would roll like so i had the t-con replaced but no change. I spoke to a repair shop they say it may be a the main board just went out it powers up fine and the repair shop said the LCD screen was not cracked what do you think the problem may be.

If you have power issues and the screen is showing horizontal lines, you most likely have some board issues. Troubleshoot the issue and be sure your screen is not cracked. Horizontal lines CAN indicate a board issue. Be sure the boards in the TV are properly secured together with the ribbon cables. Check everything visually in the TV for a bad or burned board.

Yes we agree, it is a shame to throw away a giant TV that has one bad component. We always try to tell people to fix it themselves by using used spare parts to keep cost down. Try to find the same TV online for parts. Many times we have fixed a TV by simply finding the same exact TV online on a website such as Craigslist. We had a t-con board go out on a 55″ Samsung TV. We found the same TV with a cracked screen online for $50 dollars. We bought it, removed the board, and put it in our other TV and it fixed the problem. We now also have other spare parts, a new remote control, and another TV stand in case we ever need it. If you have the money, buy new, if you don’t have the money, get creative and try to fix it yourself.

Even if the screen on your Sony Bravia TV is not cracked, it is most likely damaged. It may have a cracked inner screen or when the screen fell over. The TVs front panel may have hit and made contact with a board inside the TV. Is the front panel of screen depressed inward on any part of the front screen surface? Look at the TV screen from a side angle with a flashlight to see. If there is no damage to the front panel, then the inner panel may have cracked. You should be able to see any damage to the inner or outer screen panel when using a flashlight.

The outer screen panel of my Sony Bravia took a hit and is cracked, only a small portion of the screen has images coming out and the rest of the screen has vertical lines and black patches. Can it be fixed at home or do i get a replacement outer screen panel?

Philips 47″ LCD…comes on works fine occasionally, but usually when turning it on, a horizontal gray bar with vertical lines inside it blinks and the screen will slowly fade to white. I can see about an inch of video at the top sometimes. So I turn it off for a few minutes and try again. After an hour or so of repeatedly turning off and on, it will eventually come on and work perfectly…until I turn it off, then I have to try turning it off and on for an hour or two until it decides to work. I’ve opened the back and noticed no bad capacitors and wiggled all connectors.. Any idea?

You may have a bad power board if you need to take an hour of time trying to turn the TV on or off. What is the model number of your Philips 47″ LCD TV? Has anything come in contact with the screen? Did this problem suddenly appear or did this issue happen over time? If the screen was not hit then a board may be on the fritz. When you opened the TV did you check to be sure all boards are secure and the wire harness/ribbon cables are tight and in place correctly?

Had an incident where my 60″ Vizio Smart TV got hit on the left side of screen. Came home to turn on TV and the TV had back glow but no picture (still has sound) and a nice size point of impact. Cracked out internally (exterior panel is fine). Looking for best advice in fixing the TV, really hate to just get rid of it. The p.o.i maybe lit up kinda rainbowish and the rest of the screen is blacked out but still has glow. I realize that the internal glass panel needs replaced at the very least, based on further symptoms is there anyone that may know what needs to be done?

If the inner glass is cracked, the only way to fix the TV is to replace what is broken. The inner glass or panel for the TV can be found online but may cost more than the TV. Finding a used TV with an intact screen is the cheapest way.

I have a rca smart led lcd 65 inch I purchase the tv about a month ago from Aaron’s furniture the tv fell over now it’s cracked on the bottom right corner is this fixable and how much will it cost or will my warranty cover the tv still turn on & you can still see the picture on the tv but it’s just crack

I have a Phillips 9,000 Series Flat HDTV, 119 cm LCD. Most of the screen is blocked by a white screen, with some rainbow vertical lines within it. To the right of the main crack (which is a little to the right of the center of the screen), the white is darker and there are more rainbow lines there. Only at the very top of the screen in the middle can you see the actual channel. The TV does work overall in terms of turning on, the cable, etc. and you can still hear the sound, its just the crack. I am assuming that I would only need to change the screen in this situation. Do you have any cheap suggestions?

I have a question regarding my TV. I have started seeing vertical lines on the TV screen a couple of months ago on a right side of the screen. It didn’t bother me too much because it wasn’t that bad. I was on a vacation for a month and TV was unplugged. When I got back I turned TV on and vertical lines were gone but after a few days they were back but this time they are more lines. When I turned TV on this morning I only got sound with no picture.

If the screen has NO CRACKS, then the t-con board is the most likely internal circuit board that is causing the vertical lines on your TV. When replacing boards in your TV, always use your exact model number to replace parts. You may be able to use a t-con board made by your same TV maker if it is one model number difference, but it may not work. We recommend always buying a new board when fixing your TV yourself unless you have access to a used board for free. You may want to try testing different inputs and cables to be sure the t-con is bad but it sounds like the t-con is the issue.

You may have a bad board. If there are no cracks on the screen, a board could have shorted or become damaged. You will have to take the TV apart and check each individual board to see what may be causing the issue. Plan on trying to find a T-con board for your Samsung TV model. That is the board that controls the LCD’s lines and pixels.

A Vizio 42″ inch replacement TV screen can be found on eBay. If it just the LCD screen that is cracked there is one for around $95 dollars US. Here is the link to the Vizio TV replacement screen.

You may want to open the TV up and see if you can find a bad board affecting the screen. However… If pixels are affected then your screen is most likely bad. You can try finding a replacement board or screen (once you are done troubleshooting to find out what actually is needed) and order it online. If you open the TV, have a look at the circuit boards to make sure there is no obvious signs of burns or popped capacitors. If all boards look good visually, have a look at the inner screen for damage. Look on LCD PARTS as they have many parts you may need to fix your TV.

You need to first find the generic panel and be sure the size is the exact same, obviously. Then, make sure the panel you are looking at says COMPATIBLE with your model and size TV. Not all generic screens are made the same. Be sure the different cable connections match yours and the areas where it slides into your TV match up. The word COMPATIBLE is what you need to read. If you have a Vizio 55″ 4k M series TV, then make sure the generic replacement screen says COMPATIBLE with Vizio 55″ 4k M series TV.

A screen will cost more than your TV is worth unless you get a generic from China on a site like Alibaba. The best way for you to find a screen is find one on Craigslist that has a bad board and use that TV for the replacement screen.

I have a 32″ Westinghouse flat screen LCD TV. A small horizontal bluish red line appeared on my television about a year ago and I chose to ignore it since it was small. Well a year later, the line has spread and there are more throughout the screen. It wasn’t dropped or hit so I don’t know what happened. The warranty is out so I cant call the manufacturer. I was looking at screen repair shops but if there’s and easier/cheaper fix, I would rather go that route.

You may have a bad board in the TV causing the blue red horizontal line on the TV screen. If the TV was not hit or is not cracked, then a board may be causing the issue. This will involve unplugging the TV, removing the screws on the back, and visually examining the boards to see if you see one that is visually damaged. Look for popped or swelling little capacitors on the boards. If all boards are okay, you may have a screen issue. Is the screen cracked where the line is showing? Even a tiny crack can make that happen.

Sounds like you have a bad power supply board in your TV as to why it does not turn off and makes noise. You can either take the TV apart and check the board(s) for damage or junk it and buy a new one. 32″ TV’s are ultra cheap nowadays and it is going to be cheaper to buy a new TV then replace boards in a 32″ TV (if you factor in labor and time). You may find a new board for around $30 to $50 dollars online but there is no guarantee a new board will fix your TV without knowing which board is causing the problem. (You can usually spot a bad board in your TV if a single capacitor on a board has popped, split, or swelled up.)

My flat screen TV has had these weird vertical lines for the past week, so knowing how to get rid of them will make my TV watching experience more enjoyable. Determining whether the glass panel on my screen or the LCD or LED part of it is broken seems like something I should do right now. Both of those things seems really easy to fix.

I have a Toshiba LCD TV 32CV500E and have had it for around 4 yrs. Suddenly its showing light grey like flashing light.. still I can hear sound. What the issue and can someone advise ?

Can you see any actual cracks on the TV screen or is it purely color lines going vertical? If you see cracks the screen needs replaced. If you see vert lines only, it may be a component in your TV that was damaged. You could unplug, and open up the TV and check to be sure all boards look okay inside the TV. A component such as a capacitor may have been damaged when the toy hit the screen. You most likely have a bad screen but in some rare cases simply changing out a board or a cap on a board can fix this issue.

I have a 65″ RCA LCD LED backlight. While moving I must have put to much stress on it because it is now cracked in the top right corner with some spider Web action. Is this fixable and if so how would I go about it.

Are you aware of the screen getting hit or damaged by even though there is no physical damage? The screen could be damaged… LCD screens on TVs are made up of two thin layers of glass containing liquid crystal material between them. When the glass becomes damaged, debris infiltrates the crystal layer. If there is no damage to the screen, you may have a board or boards issue.

You should be able to buy any 32″ JVC replacement screen but they are usually not cheap. You could try Alibaba as they have just about every type of replacement screens for LED and LCD flat screen TVs.

Do you have an LED. LCD, or Plasma TV? Is the complete screen gray? Are they gray lines now or is the complete area of the screen gray? Can you still hear sound? What is the make and model of your TV?

My Samsung TV did not fall over and crack, but all of a sudden there is a little white line in the left side of the TV. I bought it new 4 months ago and got an extended warranty. Will this be covered by my warranty? Or should i research what part may have gone bad and fix myself?

If the issue persists on the external monitor, it may be an issue with the video card (GPU) or video settings and not the laptop LCD panel. Go to verify display or video issues in Windows Safe Mode. Otherwise, go to the next step.

Performance issues may occur if there is any damage to the LCD screen. The display may stop working, work intermittently, flicker, display horizontal or vertical lines, and so on, if there is damage to the display screen.

Dell laptops have integrated diagnostic tools that can determine if the screen abnormality is an inherent problem with the LCD screen of the Dell laptop or with the video card (GPU) and computer settings.

When you notice screen abnormalities like flickering, distortion, clarity issues, fuzzy or blurry images, horizontal or vertical lines, color fade, running a diagnostic test on the LCD helps identify if the issue is with the LCD panel.

Press and hold the D key and turn on the computer to enter the LCD built-in self-test (BIST) mode. Continue to hold the D key until you see the entire screen change colors.

If you do not detect any screen abnormalities in the integrated self-test mode, the LCD panel of the laptop is functioning properly. Go to the Update the video card (GPU) driver, monitor driver, and BIOS section.

If you notice any abnormalities in the LCD built-in self-test mode, contact Dell Technical Support to learn more about repair options that are available in your region.

Display settings like brightness, refresh rate, resolution, and power management may affect the performance of the LCD screen on your Dell laptop. Changing or adjusting the display settings can help resolve several types of video issues.

If the diagnostic tests on the LCD panel and the video card (GPU) passed, it is most definitely an issue that is related to software that is installed on the computer. If the above troubleshooting steps did not resolve the issue, you may try to restore the computer to factory default settings as a last resort.

Modern flat screen TV"s have a known problem with capacitors going bad. If your LCD or LED TV won"t turn on, or makes repeated clicking sounds, there is a very good chance that you can save hundreds of dollars doing this simple repair yourself.

I know, I know. You"re thinking, "Tinker inside my LCD HDTV. Are you crazy?" No, I"m not crazy. This is a repair almost anyone can do and this fix will work for any TV.

The bad News. If your TV is physically damaged in any way, been dropped, has a broken screen or gotten wet then this repair isn"t for you. But if your TV was working one day but not the next, read on.

This TV repair focuses on the small "can shaped" Aluminum ElectrolyticCapacitors.These capacitors come in many colors and sizes but are easy to find on any power board. Not only are these the most likely cause of your problem, but bad ones are simple to find and simple to replace. In most instances you will be able to visually identify the bad capacitors. You don"t need any special skills in electronics or testing.

On power board pictured above, I have indicated which capacitors you should be examining for signs of failure. These Capacitors are Aluminum Electrolytic Capacitors, and are the most likely cause of your problem. The capacitors with the green arrows are the most likely candidates for being bad, but the blue arrow are other capacitors to examine.

The pictures above are actual closeups of my TV"s board. Notice how the blue capacitors in the foreground are bulging. These are the capacitors I will replace. All other capacitors look OK. If you can find replacements for all 4 of these capacitors, and any others that show visual signs of going bad, I recommend replacing them all while your in here.

Now that you"ve identified the capacitors that look bad, turn the board over and carefully identify exactly which points on the board are the wire leads from the these capacitors.

So I took my tv apart and I think I found the problem can you please verify for me? Pictures attached. I think one of the big CAPACITOR is bad and leaking on the bottom of the board is brown.

As far as we could remember, phone manufacturers build the touch panel/digitizer with the LCD itself, while the copied screen manufacturer build it separately on the surface glass. Hence, there"s a difference in touch sensitivity. Additionally, copied phone screens usually drop the high touch sampling rate, meaning your screen may not respond to your touches faster.

One of today’s modern technological wonders is the flat-panel liquid crystal display (LCD) screen, which is the key component we find inside televisions, computer monitors, smartphones, and an ever-proliferating range of gadgets that display information electronically.What most people don’t realize is how complex and sophisticated the manufacturing process is. The entire world’s supply is made within two time zones in East Asia. Unless, of course, the factory proposed by Foxconn for Wisconsin actually gets built.

Liquid crystal display (LCD) screens are manufactured by assembling a sandwich of two thin sheets of glass.On one of the sheets are transistor “cells” formed by first depositing a layer of indium tin oxide (ITO), an unusual metal alloy that you can actually see through.That’s how you can get electrical signals to the middle of a screen.Then you deposit a layer of silicon, followed by a process that builds millions of precisely shaped transistor parts.This patterning step is repeated to build up tiny little cells, one for each dot (known as a pixel) on the screen.Each step has to be precisely aligned to the previous one within a few microns.Remember, the average human hair is 40 microns in diameter.

On the other sheet of glass, you make an array of millions of red, green, and blue dots in a black matrix, called a color filter array (CFA).This is how you produce the colors when you shine light through it.Then you drop tiny amounts of liquid crystal material into the cells on the first sheet and glue the two sheets together.You have to align the two sheets so the colored dots sit right on top of the cells, and you can’t be off by more than a few microns in each direction anywhere on the sheet.The sandwich is next covered with special sheets of polarizing film, and the sheets are cut into individual “panels” – a term that is used to describe the subassembly that actually goes into a TV.

For the sake of efficiency, you would like to make as many panels on a sheet as possible, within the practical limitations of how big a sheet you can handle at a time.The first modern LCD Fabs built in the early 1990s made sheets the size of a single notebook computer screen, and the size grew over time. A Gen 5 sheet, from around 2003, is 1100 x 1300 mm, while a Gen 10.5 sheet is 2940 x 3370 mm (9.6 x 11 ft).The sheets of glass are only 0.5 - 0.7 mm thick or sometimes even thinner, so as you can imagine they are extremely fragile and can really only be handled by robots.The Hefei Gen 10.5 fab is designed to produce the panels for either eight 65 inch or six 75 inch TVs on a single mother glass.If you wanted to make 110 inch TVs, you could make two of them at a time.

The fab is enormous, 1.3 km from one end to the other, divided into three large buildings connected by bridges.LCD fabs are multi-story affairs.The main equipment floor is sandwiched between a ground floor that is filled with chemical pipelines, power distribution, and air handling equipment, and a third floor that also has a lot of air handling and other mechanical equipment.The main equipment floor has to provide a very stable environment with no vibrations, so an LCD fab typically uses far more structural steel in its construction than a typical skyscraper.I visited a Gen 5 fab in Taiwan in 2003, and the plant manager there told me they used three times as much structural steel as Taipei 101, which was the world’s tallest building from 2004- 2010.Since the equipment floor is usually one or two stories up, there are large loading docks on the outside of the building.When they bring the manufacturing equipment in, they load it onto a platform and hoist it with a crane on the outside of the building.That’s one way to recognize an LCD fab from the outside – loading docks on high floors that just open to the outdoors.

LCD fabs have to maintain strict standards of cleanliness inside.Any dust particles in the air could cause defects in the finished displays – tiny dark spots or uneven intensities on your screen.That means the air is passed through elaborate filtration systems and pushed downwards from the ceiling constantly.Workers have to wear special clean room protective clothing and scrub before entering to minimize dust particles or other contamination.People are the largest source of particles, from shedding dead skin cells, dust from cosmetic powders, or smoke particles exhaled from the lungs of workers who smoke.Clean rooms are rated by the number of particles per cubic meter of air.A class 100 cleanroom has less than 100 particles less than 0.3 microns in diameter per cubic meter of air, Class 10 has less than 10 particles, and so on. Fab 9 has hundeds of thousands of square meters of Class 100 cleanroom, and many critical areas like photolithography are Class 10.In comparison, the air in Harvard Square in Cambridge, MA is roughly Class 8,000,000, and probably gets substantially worse when an MBTA bus passes through.

The Hefei Gen 10.5 is one of the most sophisticated manufacturing plants in the world.On opening day for the fab, BOE shipped panels to Sony, Samsung Electronics, LG Electronics, Vizio, and Haier.So if you have a new 65 or 75-inch TV, there is some chance the LCD panel came from here.

2. #Confirm whether the VAA is normal (normally about 17V). If abnormal, disconnect the RP32 to confirm whether it is caused by DC/DC loop or X-side COF: disconnect RP32, if the VAA is normal, the COF is bad, CO must be changed; COF can be Disconnect one by one to determine which NG disconnects RP32, VAA NG, try to change UP1; at the same time, confirm whether the continuity of the surrounding triode is OK.

4. #Press the LCD glass side of the panel, if the vertical lines disappear or reappear, it can be judged that the cause of poor contact, OM checking should be able to find the poor contact.

The above is the full text of LCD screen failure repair guide, we hope it is helpful to you. If you need to buy LCD and find a reliable LCD supplier, we suggest you to read our other great blog – How to find a reliable LCD supplier.

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If the LCD built-in self-test (BIST) diagnostic test passed, the laptop LCD screen is working correctly. The display problem could be due to an outdated graphics driver or incorrect video settings. Follow the troubleshooting instructions in the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Laptop.

However, if the digitizer or LCD is also damaged during a fall, that screen no longer carries value because it cannot be refurbished. Repair shops cannot sell broken LCDs to refurbishing companies; therefore, they cannot offset the cost of an LCD repair. That is why repair stores often charge a little extra if there is damage to the LCD or digitizer, to make up for that loss. Repair stores that don’t have an additional charge for an LCD repair typically inflate their glass repair price to make up for the loss from damaged LCDs. If they have one price, that means everyone is paying more to cover the cost of customers who have damaged LCDs and customers who only have cracked glass. This is why TCR separates the price of glass and LCD repairs for you! If you only have cracked glass, you only have to worry about paying to replace the cracked glass.

If your phone or tablet’s glass is shattered there will be cracks or chips on the screen itself. If it is just the glass that is damaged, the device may still function and you may be able to use it normally. If this is the case, it is likely that only the glass needs to be replaced. To prevent further damage to your device it is best to get it repaired quickly. For example, if liquids seep through the cracks it could cause permanent damage to the LCD.

Many people may continue to use their touchscreen with shattered glass and delay fixing the glass on their devices; however, if the touchscreen isn’t responsive, it could be a sign of more significant damage to the device’s digitizer which is integrated with the LCD screen.

A pixelated screen can indicate LCD damage. This would look like a patch of multicolored dots, a line or lines of discoloration, or a screen with rainbow colors. For many people, these colors are an easy way to know that their LCD is broken and that they should get it repaired.

Dropping your phone isn’t the only reason you’ll end up with a pixelated screen. Over time, your screen’s LCD may break down through regular use. This happens to other devices aside from your smartphone or tablet. Pixelation can happen to TVs and computers, too. People typically decide to buy a new device when this happens. Fortunately, with an LCD repair, you can fix the device without needing to replace it.

A black screen or black spots on your smartphone or tablet is an indication of a damaged LCD. Often with a bad LCD, a phone may still turn on and make noises, but there is no clear picture. This does not necessarily mean any other part of the phone is damaged and a simple screen replacement will get it functioning again. Sometimes it can mean a battery or other internal component is damaged. It is best to have a highly qualified phone repair technician diagnose what is wrong so the appropriate repair can be made.

Fortunately, your mobile device is fixable whether you cracked the glass or damaged the LCD. Stop by or call TCR: Triangle Cellular Repair at (919) 263-2699 for a free diagnostic and quick, affordable cell phone repair in Chapel Hill and surrounding areas. We’re always happy to help!

I’ve owned a Toshiba M55-S3294 since October, 2005. I’ve seen your first example on my own laptop only once and it went away when I rebooted the machine and has never appeared again but it’s nice to know replacing the LCD isn’t to hard after reading around your site.

I do have another question about the same laptop. Can the lid over (mine is copper) be removed without taking the LCD out? I’ve read you can change the color, so before I go looking for one on eBay, I wanted to know what I was getting myself into.

Most likely it’s the LCD screen problem. Just in case try to connect an external monitor and check out the video output. If you see the same vertical strip (very unlikely), then it’s onboard video problem – the motherboard problem. If the external video is fine, then I would suspect the LCD screen itself. Try to twist the screen, apply some tension to it. Does the vertical strip changes location, color or width?

My question is this. Is this switch bad or is there a problem with the backlight or FL inverter? I think it is the switch but, I would like your opinion.

Turn on the laptop and go into BIOS setup. I believe you’ll have to hit ESC key on start up for this laptop to enter the setup. Do you see the same lines when you are in BIOS? If not, then I would say that’s software issue and re-imaging the drive will fix the problem. If the lines are still there, even when you are in BIOS, then it would be a hardware related problem, most likely a bad screen.

Have you tried to connect an external monitor to the laptop? What about external video, is it bad too? If both screens – internal LCD and external monitor display the same distorted video, then I would suspect the system board. Let me know how it goes with the external video output.

hi, there i have slight problem with my lcd unfortunately the top 8 cm of my screen are gray and do not work, i assume it is completely broken a therefore wish to replace it however my warranty has run out. so i plan on doing it myself, i have two questions relating to this and would really appreciate if you could help me answer them. First of all the laptop in question is a fujitsu-siemens Amilo m7400 and i was wondering if i could replace my lcd with my friends Amilo m7405, in terms of resolution and size they seem identical, however i would appreciate if you could tell me whether or not i am barking up the right tree, my thoughts were that since they were the same model basically that fujitsu would probably have used the same lcd. secondly could you possibly tell me were i could get hold of some sort of manual or instructions. thanks.

It has gotten progressively worse over time. If you apply some pressure to the screen frame, the display will return to normal and the small vertical line will go away. I would assume that this is a loose connection? I intend to remove the frame and re-seat the inverter, LCD cable and do some cleaning. Does this seem like a failing LCD screen? The computer is slightly over a year old.

I would try removing the LCD and putting it back and hope for a miracle. Last month it helped me to “fix” a bad LCD on IBM ThinkPad. The screen was bad, it had some horizontal lines on it. Reseating cables and replacing the video cable didn’t help. But, after I removed the screen and put it back I got a perfect video. I think that when I put all screws on sides back in place, they stretched the screen somehow and made it work fine. I’ve never seen the customer again. I don’t know if it’s going to help you, but I think it worth trying.

I forgot to mention that the screen goes dim every couple of minutes as well. If you give the back of the screen a light tap, it will return to normal. Can you give me any ideas of where to look for a replacement LCD if that is the problem?

With backlight it could be a loose connection problem, try reseating cables on the inverter board. To find a replacement screen, you’ll have to search by the part number. You can find the part number on the back of the LCD screen and it looks like: A000002050 (you might have different part number). Try searching through Google or on eBay. LCD screens are very expensive and very often it doesn’t make any sense to replace the screen, it’s better to buy a new laptop.

If you cannot find the part number for the LCD, give me more info about your laptop: model number and part number from the bottom and I’ll look up a part number for you.

just an update, but disassembling the LCD and re-seating the connections as well as the inverter seems to have fixed the problem. Thanks for your advice.

I woke up this morning, turn on my Dell Inspiron 6000 and theres a vertical line. Reboot, Reboot in safe mode and line still there and everything runs fine. After reading the great info on this site it seems a my screen has gone bad. Below is a link to my screen while XP is booting. I need a new screen right? Just wanted to get some feedback before I go spending on one. Thanks in advance.

It looks like a bad screen. From my experience, this kind of failure (thin vertical line across the screen) is not related to a failed video cable, bad connection or bad video card.

Start laptop troubleshooting with connecting an external monitor. That’s the first thing to do when you have a bad image on the LCD screen. If the same blue and purple vertical lines occur on the external monitor, then it’s the motherboard (video card) problem. If the external video is fine, then I would say that you might have a bad LCD screen.

Hi I have a Satellite p35-s605,which has developed a red horizontal line on the display,when connected to an ext monitor there is no line,guess Lcd problem also have reinstaled the os and drivers,

I have a gateway m500 that fell off a desk and crack the LCD. I couldnt use the external monitor so we sent it in for warranty to use the external display. I bought another lcd, put it in, replaced the cables,and now I get color with vertical lines but no picture. Now that I have replaced all of this, my external monitor no longer works. Do you have any ideas on what needs to be replaced next? please let me know. Thank you

Have you tested if the laptop works fine with an external screen before you replaced the internal LCD? Disconnect the internal video cable from the motherboard and test it again with an external screen. If you still get the same lines on the external video, even when internal LCD is disconnected, then I would say that’s a bad motherboard (video card if it’s a separate module).

If the external monitor works fine after you disconnect the video cable from the motherboard, connect the cable back and test it again. It might be just a loose connection. If you still have the same bad video, then you might have a bad screen.

It’s hard to guess. First of all, I would check if the video cable on the back of the LCD screen makes a good connection with the screen. I’m not sure if it’s going to help you, but I know that on some Toshiba laptop the same white screen appears when the video cable is not seated properly.

If reseating cables doesn’t help, then it could be either the motherboard or the screen problem. I would say most likely it’s a bad screen but I’m not 100% confident.

Thanks for your response. I took the laptop apart and checked every wire in the cable going to the display and could not find any problems with the cable. Even found there is a fuse on the circuit board but that was OK. I put the unit back together and now it’s working! I think you were right, probably just a loose cable as the connection to the LCD itself does not feel that secure.

I have a dell 9400 with a wuxga true life display. Recently the video card was changed and then the lcd had a blueish tint and no blacks whatsoever. When plugged into a crt all the colors are fine and the video card works good as well. Dell is sending someone out to replace the motherboard and video card, i was wondering if you have ever run into this problem and the cause…Before the lcd was replaced it was wavy and the windows logo during start up was shadowing.. along with distortions to the color. The wavy ness is pretty much gone but no blacks color distortion and a blue tint remaiins… any ideas? why would they change the motherboard?

I haven’t seen a laptop screen with bluish tint yet, but I’ve seen a reddish tint many times. In most cases, if the reddish tint appears on both screens – internal LCD and external monitor, it’s the system board/video card problem. If the reddish screen appears only on the internal LCD screen but not on the external monitor, then I would suspect the screen itself first. I guess the same would apply to a bluish tint.

Thank you for providing all of the laptop lcd tips. I have 2 laptops with pretty much the same issue with a very dim screen or no backlight. Both laptops are fine on external monitor.

The first laptop is an Acer Aspire 3000 that is dim throughout the boot process but a Toshiba M45 has a good screen for about 10 seconds, flickers and then goes dim. I am suspecting both laptops to have a bad FL inverter that needs replacing. Do you have any other suggestions to try? Thanks.

i order inverter board-it light up but the back ground is white, character is black and desk top icon or windows had bad color like low 16 bit color ressolution, the color look like example 2 above but no line. Hook up SVGA work ok.

I have reseated cable hardness from lcd to mothe board so many time. My question is…is it the inverter i have ordered and replaced is bad. I think the invert board is to convert small dc voltage into high RMS voltage to ignite the backligh and control

I recently purchased a toshiba satellite p35-s609 from ebay, my problem is similar to bernie’s in which when booting up there will be a couple red lines on the left side of the screen, while installing windows xp I noticed that there is a reddish hue and diminished color (the white sunburst gradient cirles on the background of the windows turn into reddish circles), this problem is not duplicated on an external monitor. I found that if I tilt the laptop a little will reset the color and brightness to its normal display and stay like that as long as it is kept in that position (which is a little awkward at times). Could this hopefully just be a loose connection from the LCD to the motherboard? I have yet to open it up and wondering what my current options are.

I’ve never seen that FL inverter causes such a problem. You a right, the inverter convert voltage for the backlight bulb, but from my knowledge it cannot affect colors on the screen. I guess you might have a failed video cable, but most likely it’s a bad screen.

BTW, look inside the video connector on the motherboard and video connector on the back of the LCD screen. Check if there are any bent pins. Last week I had to repair Toshiba Satellite P30 with a backlight problem. After 15 minutes of testing I discovered that couple pins inside the connector on the motherboard were bent and the video cable didn’t seat properly. The problem was fixed after I carefully straightened the pins.

In the top navigation bar there is a tab “Laptop Parts”. In there I listed 2-3 companies who sell LCD screens for Toshiba. We worked with Spare Parts Warehouse and AG Parts (used to be ID parts) and don’t have any complaints. Man, screens are expensive.

What does work though is if I leave the lcd screen connected but remove it from the case (so it’s not touching the laptop) the lines go away. Is this a grounding issue. It seems like I am close to fixing it but can’t figure it out…

Hi! I just got a new laptop: the HP Pavilion DV8333EA and I’m already facing problems! It’s not a major issue but there seems to be a strong pink tint between text on my lcd screen; particularly between vertical characters such as ‘t’, ‘l’ and ‘i’. It’s quite distracting and I didn’t expect such from a brand new laptop. How can I resolve this?

Is your laptop still under warranty? It could be a major issue with the LCD screen or with the video card. A new computer shouldn’t have any pink tint between characters.

Connect an external monitor and turn on the laptop. If you can see the same pink tint on the external monitor, then it could be related to the motherboard (video card). If the external monitor dis