lcd panel symptoms quotation

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.

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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.

As soon as I heard about LCD displays, and even more after seeing some flat panel monitors at computer shows, I became a fan of this technology. As a computer user sitting in front of a monitor for more hours than the sun shines in the sky, I was very happy that I would soon be able to enjoy a flicker-free and radiation-free alternative to bulky and power-hungry cathode ray tube monitors. That was until I tried them, beginning a story of hard to describe discomfort and an apparently vague relationship with existing research involving factors such as fluorescent light, flickering, lighting, glare, contrasts and patterns. I now refer to this as “LCD Syndrome”.

If you reached this page because you are experiencing symptoms with a new monitor you may want to try and reduce the brightness and/or increase the general ambient lighting. Excessive display brightness and large contrast between the display and the environment are common and easily solvable causes of discomfort.

I found out in 1996 that I could not make full productive use of an LCD display (800×600 resolution) for longer than 20-30 minutes, after which I began to feel uncomfortable. This was not easy to describe, because the symptoms were not particularly strong, and they were going against the expectation and conventional wisdom that LCD displays were better than CRTs. I would say it was a combination of slight headache and eye irritation. I normally had no problems with fluorescent lighting, nor with any working environment in general. I do however feel a similar discomfort when standing for some time near certain mosquito killing devices which use a violet fluorescent tube to attract the insects.

A friend of mine develops symptoms similar to ones I experienced after only about 5 minutes, and he was the one who led me to the first apparent cause of this: the fluorescent light use for the backlighting of the display. He is a teacher, and the first thing he does when he enters a classroom is to switch off the fluorescent lights. He says he is “allergic” to fluorescent light. When he purchased a notebook with a black and white LCD display he found out that he had the same problem he has with fluorescent room lighting. I personally tried out a variety of LCD displays, from the cheap ones up to the high end, and I also spoke with a lot of people about this, concluding that the issue is surprisingly more widespread than I expected it to be. The feedback I am now receiving from this text also appears to confirm this.

Frankly, I was amazed and puzzled as to why none of the reviews of notebooks or LCD displays that I was aware of at the time had ever mentioned this. The first thing that came to my mind is that this is a relatively new technology, and the new parameters that need to be evaluated are not yet part of our testing and buying culture. A second aspect of this issue is that the problem in my experience only develops under real working conditions, rather than when admiring the sharp pixels of an LCD display for a few seconds at a trade show, or testing the LCD viewing angle for a review or in a computer store.

According to my personal observations with panels employing this technology, many people cannot work continuously with such a display for as long as they can with a traditional CRT. Some people feel a headache after about half an hour of work in front of an LCD panel, yet they can stay 16 hours in front of a CRT. My situation improved when I conducted tests on word processing tasks with white text on a black background, rather than black text on white background (which, traditionally, on a CRT with a sufficiently high refresh rate is considered to be more ergonomical).

I am not a doctor nor an expert in this field, and I did not have a chance to conduct tests on a sample wide enough to be considered significant. The feedback I am receiving may be biased, as it is increasingly based on this article (i.e. people may be finding a description of the problem they have been looking for, rather than an unexpected and new perspective). Yet I am left with this personal feeling that there is “something wrong” with LCD displays that has not been researched or mentioned enough. I hope that these notes of mine can inspire somebody to perform more thorough investigations.

While everybody appeared to be focused on the “zero radiation” advantage of LCD technology, I could not avoid thinking that, behind the liquid crystals (which the “L” and “C” letters stand for), there was a source of light. This happened to be the same fluorescent light technology which, I knew, was not recommended for use as the only light source in offices. So, if there was something less than ideal about using it too much in an office, how came nobody mentioned this in relation with the fact that LCD display users stare at such lights all day?

Checking things like the refresh rates and the frequency peaks of a source of fluorescent light is not normally done with CRT displays, and does not naturally cross one’s mind when thinking of liquid crystal displays. The fluorescent light is a separate component from the LCD display, and is never mentioned as part of the final “LCD display” product.

The incandescent filament of a light bulb probably also generates a more stable light than the fluorescent substrate under the intermittent pulses of electrons. Assuming that fluorescent light is a bit like the scan lines of a television, i.e. it turns on and off all the time, but our eyes and nervous system make us perceive it as a persistent light, I cannot understand how some publications that praise LCD displays ignore this similarity with what is possibly the most negative aspect of CRT displays. Even if you don’t normally perceive the flickering of your display or TV, if you point your eyes upwards, you may be able to discern some flickering in the lower part of the visual region (the peripheral area is more sensitive to flickering). I am sure that there is a range of frequencies, which may or may not include the refresh rates normally used for fluorescent light, which cannot be perceived by the average person, but which can cause discomfort in the longer term.

Even if it is claimed that flicker is not perceptible at rates of hundreds or thousands of times per second, it must also be considered that this applies to a single source of light, and not necessarily to multiple sources of lights, which may not be in sync with each other. In physics, when two or more waves are added up, they result in a new wave pattern. Interference phenomena might apply to LCD displays (e.g. displays that have two fluorescent tubes), room illumination (with multiple light sources), and combinations of LCD displays and room illumination.

Could it be that the fluorescent light is a factor or co-factor in this “LCD Syndrome”? And if so, is it because the spectral distribution of the light is not what evolution trained us to live with, or because a pulsating source of light is used for the background illumination, or for a combination of both reasons? I know people sensitive to fluorescent light, but also people sensitive to flickering in general (even to the way frames are displayed at movie theaters, which is considered relatively stable).

“Temporal dithering” (also referred to as Frame Rate Control, or FRC) works at the pixel level. Just as you can create a pattern of yellow and red pixels (spatial dithering) to create the illusion of orange, it is also possible to quickly alternate red and yellow in the same pixel. This technique is sometimes employed to increase the perceived color space, for example to render 24-bit color on LCD panels that without dithering would be more similar to a 20-bit display.

On some LCD monitors the backlight has maximum stability at maximum brightness, but different degrees of modulation are applied when brightness is reduced. In practice, the image begins to “flicker” as brightness is reduced.

LCD displays are better known for their brightness and for their “sharp pixels” than for the fluorescent light they employ. What if one of those very same factors which are normally considered positive in benchmarks, such as its crisp pixels, were part of the problem?

Microsoft Windows includes a font smoothing technology called ClearType, which uses the colored sub-pixel components of LCD display pixels to increase the perceived resolution, while at the same time reducing the contrast and sharpness of the (larger) individual pixels. It can be enabled in the Appearance tab of the Display Properties, under Effects…

I later found out about research done in the field of “pattern glare”, i.e. a hypersensitivity to repetitive patterns, including stripes and lines of print. It seems to correlate with my observations on pixel patterns, also considering that in my 1996 800×600 LCD monitor the individual pixels could be discerned much better than on newer monitors (which, at much higher resolutions, have significantly smaller pixels).

In my experience LCD displays have higher default brightness settings, and can reach an even higher level by adjusting the settings. A possible explanation for the high default settings may lie in a combination of technology and marketing. While CRT technology is limited in the maximum brightness that can be achieved (visible light is generated by the phosphor coating behind the glass when it is hit by an invisible beam of electrons), in LCD displays the rendering technology is separate from the light source, making it possible to use brighter sources of visible light. Since maximum brightness is often a parameter in monitor benchmarks, and it may help get noticed in a store, manufacturers are tempted to prefer (since it comes at a relatively low cost) high brightness technology in LCD displays.

One piece of advice I can give in case of perceived problems in relation to LCD displays is, indeed, to try and reduce (even drastically) the brightness settings, as these displays can be, in my personal experience, much brighter than CRTs. I have seen this solving more than one problem case. I set the brightness to 0 (!) on my Dell 2407WFP monitor, and it still doesn’t look too dark even to bystanders. The ambient lighting should also not be too low, relative to the display. If you suffer from discomfort, try and adjust the environment so that the ambient-to-display brightness contrast is between 1:3 to 1:1 (room background and display are about the same perceived brightness).

Whereas sunlight and light emitted by incandescent bulbs and CRT displays oscillates in multiple directions perpendicular to the light beam, the fields from polarized light oscillate in only one direction. Polarized light is not only produced from certain light sources, but it can be the result of non-polarized light being reflected from certain surfaces (e.g. water or glass), or being filtered by polarized filters, which include certain sunglasses, liquid crystals, and the polarizer plastic sheets used in LCD displays. Several animals are able to detect light polarization. Some, like honeybees, use this sensitivity as an aid in their navigation.

On LCD displays a combination of polarized filters and the ability to electrically control the polarization angle of liquid crystal molecules is used to produce images. Two side effects of this technology are that:

Our sense of depth in viewing the real world is the result of several factors, which include the fact that each eye sees a slightly different view of the world. This is also used in stereoscopic (3D) visualization technologies, some of which have viewer discomfort as a well-known side effect. It is also known that when the angle or separation of two cameras used for a 3D film is not “natural”, this may lead to headache. This may be caused by the inability to cope with excessive 3D cues, or by “wrong” cues altogether. If this is a factor affecting 3D display technologies, and considering that most LCD displays have a viewing angle limitation which results in slightly different images (colors) being received by each eye, there could in my opinion also be a relationship with LCD display discomfort.

Factors like the increased visibility of individual pixels and patterns of pixels (which phenomenon can be reduced, e.g. by using technologies such as ClearType or by using higher resolution displays), and the high brightness potential of LCD displays (which brightness can also easily be reduced by adjusting the monitor settings), lead to interesting parallels with the triggers and mechanisms which are related to headaches and other symptoms in a condition known as Scotopic Sensitivity Syndrome, Asfedia (Arrhythmic Saccade and Foveation During Edge Detection) or Meares-Irlen Syndrome.

When I first heard about companies like TintaVision and Irlen Institute I was prejudiced by the perception of organizations that seemed to be interested in selling colored glasses, filters and other “patented” methods without exposing a sound scientific method. I would have preferred some scientific research (published papers with double-blind studies and reproducible results, independently verified by others) rather than web sites providing only convenient examples and case studies going all in one direction. In the meantime, such research is beginning to appear. For example, see Bruce J. W. Evans and Florence Joseph in “The effect of coloured filters on the rate of reading in an adult student population” (Ophthalmic and Physiological Optics 2002 22: 535-545). At the same time, I could not find the topic being related by others to manifestations of LCD display discomfort. However, I also have observed how extreme brightness, which is on the opposite end of using colored lenses or reducing the monitor brightness, can be a factor in LCD discomfort.

Volatile organic compounds (VOCs) and other chemicals have been studied for years with respect to their relationship with “sick building syndrome” and discomfort related to “new car smell”. The chemicals that can be released when new computer equipment is unboxed and used for the first few weeks are often similar to those that seep from walls, furniture, carpets, glues, paints and plastics in buildings and cars, and which have been linked to headaches, watery eyes, sore throats, nausea and drowsiness. The symptoms have been traced not only to the individual components, but also, in a larger measure, to their combination, and even more so when ozone (from laser printers, copiers or car traffic) is added.

As of the end of 2001, i.e. after more than five years of additional experience since I first wrote this text, I keep getting a diversity of feedback from readers of this page, however I am now myself using the 1600×1200 pixel LCD display of my notebook computer (IBM ThinkPad A21p, pretty high resolution, I love it, but I know that other people are not at ease with the small pixels). I actually prefer the notebook display to the same resolution displayed by a top-of-the-line brand name 22″ CRT set at a high refresh frequency. Although the LCD display is smaller, the pixels are much more detailed and crisper, resulting in the smaller display being much more readable than the larger one. This was, of course, also the case with the first LCD displays I tried more than five years ago, but something must have changed in the technology, or maybe it is the higher resolution, as I can now work all day on an LCD display without discomfort. It could be that at a resolution of 1600×1200 my eyes are not trying to focus on the individual pixels as they had possibly been doing at 800×600. Also, one of the first things I do on most new LCD displays is to reduce the brightness.

Changing the surrounding lighting (e.g. adding a small light to reduce the perceived brightness of the display) has also been reported to help. Quite often LCD displays are sharper, but smaller, than CRT displays having the same resolution, so that old habits may result in the LCD panel being positioned too far away, which also can cause a type of discomfort not experienced with larger displays. I’ve heard of cases where even an additional keyboard placed in front of a notebook computer caused the notebook (and its LCD display) to be placed too far away to be comfortable, yet the cause of the discomfort was not immediately obvious. On the other hand, the closer the distance the more likely it is that the eyes recognize the individual pixels, which may or may not be related to the perceived problem. Working with notebooks, where one can’t easily adjust the distance and height of the display, we have moved one step back in ergonomics, compared to when independent keyboards where introduced (and often made compulsory with a lot of energy, compared to the silence that is accompanying the widespread use of notebooks).

It appears that LCD displays have introduced a new combination of elements which are not present in nature, possibly including issues such as spectral distribution, flickering, more recognizable pixels and patterns, increased brightness, polarization and “wrong” binocular cues. This is not what evolution has trained us to live with under the sun, and some people react to it differently than others. In particular, given a combination of these factors, some people appear to develop an “LCD Syndrome”. I hope that this little research helps, at least to know that if you read this page up to this point, you are not alone.

I was wondering if you’ve heard from anyone who is experiencing these headache/nausea symptoms after purchasing an LCD TV? I have recently purchased an expensive 50 inch LCD […] TV and am finding it difficult to watch – about five to ten minutes in I start feeling headachy and nauseous. I love the screen resolution and find it to be a much better picture than other large screen TVs (other than plasma), but I’m afraid I have wasted my money. Has anyone given you advice in this area on how to relieve the LCD-induced strain?

Hi, you cannot imagine how grateful I am to you for writing your online article about LCDs and Fluorescents. It was such a tremendous relief to read all those testimonials and thereby know that I’m not alone in my experiences. May I suggest a way to make your site Google-findable to a greater cross-section of people, by adding more keywords, such as: “EMFs, electromagnetic fields from monitors, electrosensitive to monitors, electrosensitivity issues” (remember, some people may be deluded by mass misguidedness, into thinking that theirs is an EMF problem versus a photosensitivity problem…

I can’t tell you how relieved I was to find your posting on your website about LCD problems. I experience those symptoms too of eye fatigue and headache within a few minutes of starting up my new iMac. It is actually more problematic than my […] CRT monitor. I also have problems with fluorescent light boxes for film and flat panel light boxes. Quite a handicap since I am a photographer who wants to do more Photoshop. I keep looking for solutions, or scientific confirmation of what you and your respondents describe.

I just wanted to say thank you. I found your article on LCD Displays and Fluorescent Light, I now realize it isn’t just me and have told my boss I would like to go back to my old fashioned monitor.

I stumbled across your page while looking for LCD information, and my experience is the opposite! I’m 20 years old, I cannot sit at a CRT monitor, usually including a TV, for more than a couple hours. The symptom are a bad headache and more fatigue than with an LCD. I view the CRT monitors at about the same location as I do LCD monitors. I don’t think it is the refresh rate, but it could be. I usually have it set to a minimum of 75Hz, which is when I can barely see the flicker from the refresh (although, I can see it quite strongly out of the corner of my eye). I have the resolution the same as my LCD screen (1024×768) because that’s the max of my LCD, and CRT’s tend to get too blurry when you put them at any more than 1024×768 (comparatively). Right now, I only have a laptop, and I use it in all types of settings. Even when it is on my lap, I don’t get a headache.

Thank you for your article… I have been suffering from the above for a month and you have told me more than any doctor/optician/ophthalmologist. I must have spent about 20 hours searching the ‘net for info… A month ago I started noticing the same symptoms as you: funny feeling in the eyes, slight headaches. The first day it took just 1 hour to recover. the second it took 3h. Then the whole night. Then the whole weekend. Then by the end of the week it would just take one hour in the office before I had to go home!! However in my case, I notice that I am now very much allergic to fluorescent lighting (I was not before…) I hadn’t thought about the possibility that it could be my new LCD screen which has thrown me “over the edge” by exposing me to all this light… sounds very likely now.

What a relief to read your article “LCD Displays and Fluorescent Light.” I’ve been struggling with a brand new […] 17″ TFT LCD for four months now. I spent $1000Cdn trying to avoid eye strain and radiation and I’ve just ended up with some of the worst headaches of my life. I even went so far as to get the company to send a replacement and nothing has worked. It would make a lot of sense if the problem was some kind of inherent issue with the fluorescent lighting.

I’m a computer engineer; I spend all day in front of my CRT monitor without a problem, year after year. I recently bought and returned several new CRT monitor because they had various focusing/convergence problems. I then bought a [LCD monitor], which is wonderful for its clarity and color saturation, but seems to be burning-out my eyes and causing low-grade headache, even when I reduce brightness to zero (as dim as I can make the display). This is disappointing. I don’t think I can use this device. […] The LCD image seems to be good to your retina and bad to the rest of your nervous system.

I noticed irritation almost immediately, as you did, but tried to rationalize it as something else (sometimes if I each too much citrus, my contact lenses will irritate my eyes as tear mucus levels drop), but this irritation kept on building, and my eyes still bothered me a little when I woke up the next morning. Then I noticed that the eye irritation and headache would literally surge when I switched the screen to a mostly white image (like black text on white background). […] There have been enough studies done confirming the bad physiological effects of fluorescent lights in classrooms and workplaces for us to infer that putting the same device behind an LCD shutter matrix one foot from your face it at least as bad as a fluorescent light overhead.

I found your discussion of LCD and fluorescent lights very helpful. I have never been able to use them successfully. My most recent attempt, on a truly lovely new Apple display, quickly led to vague eye discomfort and vague nausea. It wasn’t going to work!

Oh my god, you’re so right! […] Excited about all those “easy on the eyes” reviews about LCD displays, and frustrated from those flickery CRT monitors, I bought me a new and shiny LCD monitor. Ten minutes after I started using it, my eyes became “dizzy”, accompanied with a little headache, and I could surely see the white background flickering like hell. I thought to myself : “what the hell? wasn’t I supposed to get a relief for my soaring eyes by this new invention?” then I checked the web and I found your article about LCD Displays and Fluorescent Light. I almost cried when I realized what a waste of money this whole LCD shit is. I’ve put a lot of money buying this new screen and now I realize that it was for nothing, my eyes will continue to suffer, and there’s nothing I can do about it.

I’ve been suffering from debilitating chronic daily headaches for almost 2 years triggered by the [both CRT and LCD] computer monitor. My headaches get better after I stop looking at the screen for about half an hour. The days I don’t use the computer at all I feel great. My headaches are also triggered by fluorescent lights. I tried a TFT LCD monitor, my headaches got better but I still got daily headaches. LCDs aren’t supposed to flicker but I could sure see them flicker.

Fluorescent is fluorescent is fluorescent. Whether or not it is overhead, actually, or behind a small screen (if the LCD screen is fluorescent-lit). […] I’m somewhat rusty regarding the issue, but I will tell you what I remember. You are correct regarding natural, real sunlight. he spectrum is distributed fairly equally between the visible regions. UV is something like only 12% of the total. The rest is visible. The problem with fluorescent light is in order to make it bright (sorta like “sunlight”) they must use a great deal of green and blue. “Full spectrum” uses a huge amount of visible blue. What it does is peak at an incredibly high level. I.e.: sunlight has approx level (I’ve forgotten the technical term, but if you need to know I’ll dig it out of my file) at 225 of visible blue and fluorescent has over 1000 around the 435 nm level. The problem is, our eyes have developed to operate and see things visually at the range of 225 and fluorescent light over stimulates the eye to produce the same effect indoors. The retina of the eye is best stimulated by “blue.” I have in my possession only a fraction of animal/insect research that proves visible blue damages the retina at a level that is not easily seen on routine eye examination. In the studies, if the exposure was short, then there would be repair by the eye. If the exposure is long-term, there is permanent damage. When I was trying to have the ophthalmologists read the research I’d gathered, they only say the animal research does not apply to humans. I don’t believe them.

Any comments or experience you would like to share are very appreciated.If you would like to provide feedback concerning a newly purchased LCD display, kindly also consider adding a few details such as:

Did you place the LCD panel in the same position (e.g. on your desk) and lighting conditions (e.g. background) where you previously were using a traditional CRT monitor?

The term ‘flat screen’ applies to a wide range of TV types, from LCDs to the latest 4K and Smart models. A flat screen means the TV’s screen surface is flat rather than convex like older models. There can be several different types of flat-screen TVs, from older LCD to the newest Smart and 4K TVs. The type impacts the repair costs because more advanced and expensive TVs have more costly components to replace or fix. In addition, some TV repairs may not always be possible on that type. For example, it is not possible to replace the screen on a plasma TV if it cracks and begins to leak. The table below shows common television types and average repair costs for each:

Repairs for LCD TVs cost between $60 and $400. LCD televisions are one of the most popular options on the market, available in a wide range of sizes and styles. They use an LCD (liquid crystal display) with backlights to produce images. The backlights, screen, and other components may get damaged over time and need repairing.

LED TV repairs range from $60 to $400, depending on the scale of the problem. LED televisions are a specific type of LCD TV that use LED backlights to illuminate the liquid crystal display. These TVs usually produce more colorful and vibrant images and are more energy-efficient, but the LED backlights may need to be repaired or replaced over time.

TV panel repairs average $200 to $400 in some cases, but some panels cannot be repaired. For this reason, many companies do not offer panel repair. So if your television gets a crack in the panel, you may be better off buying a new unit instead.

In some cases, your TV components may not be able to be repaired, or it might be more cost-effective to replace them with new ones. The repair price includes the cost of new parts, plus the labor required to fit them into place and remove the broken components. While some components can be replaced, they may be extremely expensive or cost-prohibitive to do so. This is mainly in the case of panels and screens because they often contain too many parts to replace on their own. The table below shows average costs for a variety of common replacements:

Fuse replacement in a TV costs between $60 and $150 and is one of the easier replacement jobs for a repairman. Glass and ceramic fuses on your TV’s power supply board may blow in certain situations and need replacing. To replace a fuse, the repairman opens the TV to access the power panel and swaps out the fuse.

TV bulb replacement costs average $75 to $200. Bulbs are usually found only in older models of LCD TVs or projection TVs. They are used to illuminate the display so that the picture can be seen. Bulbs are relatively easy to replace, but the material costs are a little higher with bulbs when compared to other components, leading to varied replacement prices from model to model.

Picture tube replacements range from $200 to $300 on average. Picture tubes, also known as cathode ray tubes or CRTs, are only used in older TVs. So, this is not a replacement job you need to worry about with an LED or LCD TV.

TV screen replacement costs at least $400 to $1,000 and often much more. The screen is the most expensive part of a TV. So usually, the cost of replacing it is higher than just buying a new unit. In some cases, this is because the screen cannot be replaced without also replacing most of the other components, particularly for TVs like LED, LCD, or plasma. Most professional repair companies do not offer screen or panel replacement as a service.

TV panel replacement costs a minimum of $400 to $5,000 and often a lot more on some of the high-end 4K and Smart screen displays. Because the cost of a replacement panel is so high, it is usually more cost-effective to simply purchase a new television. Like the screen, this is due to the number of components involved. Therefore, most repair places will not offer panel replacement as a service.

You might not know exactly which part of your TV is broken or damaged at first. The symptoms of a broken television vary from vertical colored lines across the screen to audio issues, power problems, and even situations where the television starts normally but then turns itself off. For this reason, most repairs start with a diagnostic so that the problem can be found and a plan made for repair. For some repairs to be made, the part will need to be replaced, while in other cases, repair or replacement of that part may not be possible. The table below shows common problems and average repair costs for each.

Repairing horizontal lines on your TV costs between $150 and $400. It might be an issue with the motherboard, or it could be a problem with loose cables between the panel and the control board. To fix this issue, the television needs to be opened up and analyzed by a professional repairman.

Often, you must decide whether it is worth repairing your TV because in many situations, the cost of repairs is higher than the price of a new TV. For example, when screens are cracked or damaged, the cost of replacing a panel is usually much higher than simply buying a new TV.

The good news: a broken screen doesn’t mean your phone is kaput. In fact, if only the glass is broken, the fix is quick and inexpensive. The bad news: if the LCD screen is broken, you’re looking at a pricier repair.

If you’ve looked into replacement parts, you’ve likely come across two very different options: a glass screen, and an LCD screen. While the first option is cheap, the second is definitely not. Here’s the difference:

If you encounter any of these problems, you’re dealing with a broken LCD screen. If the glass is shattered, but the display is clear and touch capability is working, that’s a good sign. The problem is probably just the glass screen.

Whether you’re dealing with cracked glass or a broken LCD screen, you can find a quick, reliable repair service at FastPhoneRepair.com. Our qualified technicians will get your iPhone repaired and up and running again in record time and at reasonable rates.

Unfortunately, most of that stuff requires either a certified repair or a complete replacement to fix. Unless you’re especially handy with electronics and you just happen to have access to cheap replacement parts, it’s usually better to either return a monitor to the manufacturer (if it’s under warranty) or simply buy a new one. Even so, here are the most common ailments for modern LCD monitors, and what can be done to fix them…or not.

An incorrect refresh rate setting can also cause flickering. The refresh rate is the number of times the computer sends an image to the monitor per second, expressed in hertz. Most LCD monitors use either 59 or 60 hertz, though 75Hz, 120Hz, and 144Hz are also found on premium monitors. Go into your operating system’s display settings (right-click desktop and head to Display settings > Display adapter properties > Monitor in Windows 10) to make sure the right hertz setting is applied—you may need to update your video drivers as well.

Unfortunately, most other flickering symptoms are caused by a power deficiency somewhere in the monitor itself. It’s possible you could be drawing too much power from one of your home’s electrical circuits or overloading your surge protector—just move the power adapter to another plug to test this. But it’s more likely that there’s a loose or malfunctioning component in the screen assembly itself. If that’s the case, repair or replacement are the answers.

Black or single-colored lines on LCD screens are caused by a lot of different issues, but if the standard fixes outlined in the flickering section above don’t fix them (check your video and power cables for problems, install new drivers), it’s probably a physical defect in the screen itself. Try your monitor on another computer or laptop to see if the problem persists; if it does, you’re probably looking at a replacement, since the error is almost certainly in the LCD panel (the most expensive component of the monitor).

A “dead” pixel is a single dot on your LCD screen that doesn’t illuminate, showing up as one or more black squares. “Stuck” pixels are similar, but instead of showing black they’re stuck on a single color that doesn’t match the computer screen’s image, typically either red, green, or blue.

There isn’t much you can do for a dead pixel—it’s a physical malfunction of the screen panel. Luckily one or two dead pixels usually doesn’t mean you have to throw the whole monitor away; it’s certainly possible to work around it or ignore it. You can also look into a warranty replacement, though many monitor manufacturers won’t replace a screen until multiple pixels have gone out.

A stuck pixel may be a different matter. Depending on exactly how the problem is manifesting, it might be possible to get the pixel back into working order. There are various techniques for this, ranging from physically “massaging” the screen panel itself to running programs that rapidly cycle a portion of the screen through the color spectrum. You can try out some of these solutions as outlined in our guide to stuck pixels, but be warned, in my personal experience, it’s exceedingly rare to find a lasting solution to a stuck pixel.

If your monitor has a visible crack, a large discolored area, or a black/multicolored spot that doesn’t align with the pixel grid, it’s been subjected to physical trauma and the LCD panel is damaged. There’s nothing you can do here: even if your monitor is within its warranty period, it almost certainly won’t cover physical damage. You could try to replace the LCD panel itself, but since the replacement part will be almost as expensive as a new monitor anyway, you might as well start shopping.

Most of the above problems can happen to the LCD screens used in laptop PCs and tablets, too…but because of the compact build, they’re much harder to repair. That being said, the extra expense of a laptop versus a monitor might make it a much better candidate for a repair rather than a replacement. At the very least (assuming you’re out of the warranty period), it’s probably worth a diagnosis and quote at a repair shop, if you’re not comfortable replacing the screen assembly yourself.

LED and LCD TV Repair is it worth it? For a lot of people who are using LED or LCD TVs, there is a real fear about breaking. Anyone who has owned an expensive and high quality piece of technology knows that there is a good chance a break means it cannot be repaired. However, this “common” knowledge is actually an assumption that isn’t rooted in much fact. With the right professional, it is possible to get your television working again without any problems. More importantly, you can do so without having to worry whether or not you have to buy a fully new TV!

If your TV panel is still in one piece, meaning a brick hasn’t gone through the screen there is a good chance it can be repaired! A lot of common issues such as power, audio, HDMI can be fixed.

The most important part of any LED TV repair is to figure out what is wrong with the product in the first place. Imagine a scenario where your television suddenly stops working and you think it is broken and thus throw it out. In some cases, a LED or LCD TV repair job means looking at the software and seeing whether there is a quick fix.

There are some people who claim to have expertise in a certain field, but actually do not have many credentials. You want to make sure that you find a professional for LED TV repair so that you don’t end up with an even worse television or being wrongly told that you cannot fix it. There is a risk of finding a poor quality LCD TV repair person so make sure that you are able to find someone who knows what they are talking about.

If you can’t figure out what is wrong with your television or you just want to get the opinion from an expert, it’s a good idea to start looking for local shops that can help you. Even if you have to travel a bit to find a good quality LCD TV repair person, you’ll welcome it in the end when you are at home with a fixed television that is as good as new.

Pressure damage is just like it sounds. Too much pressure was on the laptop"s display causing the LCD to crack. This could happen by holding the laptop too tightly when carrying it. If you put the laptop into a bag when transporting it, then anything else in the bag could put pressure on the display and cause the LCD panel to crack. Neither of these would leave any external marks or signs. You do have to be a bit more careful with the Retina models since their displays are extremely thin and a bit more fragile.

If there are multiple cracks in the glass or the LCD panel, then Apple considers it accidental damage even if there are no signs of impact or external damage.

The images below provide examples of symptoms that are most often caused by physical damage. These symptoms indicate that warranty coverage is voided.

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!

LCDQuote.com is a specialty stocking distributor and repair provider of LCD displays. We"re located in the shipping corridor of Southern California, conveniently just miles away from the west coast hubs for both FedEx and UPS -allowing for extended shipping hours to get critical parts on their way to you.