lcd panel no screen quotation

Liquid crystal display (LCD) is a flat panel display that uses the light modulating properties of liquid crystals. Liquid crystals do not produce light directly, instead using a backlight or reflector to produce images in colour or monochrome.

As the most common display equipment in our daily life, the monitor has been closely related to our work and entertainment. For consumers now, the highest level of attention or 1000 yuan display, but now the display market products and brands are numerous, a lot of products in the name of low-price display banner, but in fact, the quality of display products is not up to standard.

When choosing a monitor, we tend to pay too much attention to the parameters of the screen, the understanding of the internal structure of the monitor can be said to know nothing. For many monitor users, it is rare to have the opportunity to disassemble the monitor. Compared with computers, notebooks, and other products, the internal structure of the monitor appears more mysterious.

Because now the heat of the e-sports display is very high, many do not have the performance and parameters of the display e-sports and low double banner to deceive consumers, improve sales, so the author also wants to remind the majority of consumers in the purchase to pay more attention to these points, to avoid being cheated.

First of all, the first step is to remove the frame of the display. Here we need to say that many people do not easily remove the display by themselves, because the frame of many displays is better sealed. In the process of dismantling, it is easy to damage the buckle and cause irreversible damage.

Below is a picture of the inside of the Samsung display that we have dismantled before. By comparison, we can clearly see the difference in the workmanship and materials used between the two. The jail-cutting phenomenon in the picture above is very obvious.

After looking at the internal structure, let’s take a look at the gap between the main control circuit board. A cheap display IC circuit board design is very simple, many components are fixed with hot melt glue, and the solder joints on the circuit board are very rough poor womanliness. Compared with the Samsung display molding, components arranged neatly for the circuit board, such workmanship is indeed very pit, simply can not guarantee the service life of the display.

The image below shows the monitor. I had worked in a computer company for many years the computer test, this belongs to the screen light-leaking before assembly will be selected, it belongs to the unqualified products, but the company also spent money, after all, so will use all the products selected defective assembling, made “machine” sales promotion, the price of the advantage of this machine is very low, often 100 yuan, the Sale price is likely to be 10 yuan, after the department of the “repair”, is not hard to find professional and technical personnel, such as poor deformation, the distance between the two parts, different color, light-leaking, screen impurities, scratches (by coating treatment is generally not easy to find, after a long time away you’ll think is their careless); Laptops, for example, are particularly concerned about appearance and can use alcohol to wipe the case.

Then I checked the Internet for information about the panel used on these cheapest monitors. Searches the major panel inquiry website, can not find the detailed information of this panel, it can be seen that this panel is not produced by the mainstream panel manufacturers, the quality is suspicious. And the information on the label is very simple and provides very little information.

After looking at the above series of data, we can also know the quality of this panel. Through the data, we can determine that this panel is produced by an unknown small OEM, and the quality cannot be guaranteed at all. From the materials used to build the interior to the panel selection, it’s easy to see what’s still profitable behind its low price LCD. Through the actual dismantling, the method revealed the cheap LCD screen jerry-building, quality control is not a good phenomenon. Through this dismantling comparison, we also see the gap between the brand manufacturer’s monitor and the unknown manufacturer’s monitor in the work and the material, and those unknown brands of the bottom screen have no actual after-sales service, once the product is bought out of the problem, the final is cheated by the consumer. So in also want to remind the majority of consumers in the purchase of display to consider, do not because of cheap LCD screen price and bring more trouble to their own.

We offer character LCDs and graphic LCDs as modules or COG (Chip On Glass) displays in a wide array of character and pixel configuration sizes. From yellow/green, red, orange, green, blue, amber, white, and RGB backlight colors to displays without a backlight, we have the perfect LCD for your application.

Just like televisions, laptop displays start to flicker too after a few years. You may sometimes also notice the display turning blank even when the laptop is on. Alternatively, you might find some white lines running down the display.

If the DC jack has broken, you can try adjusting the plug’s angle in its jack. If you see some lights turning on but the device is still not booting, it’s time to replace the DC jack. If that doesn’t help, it’s a clear indication of a motherboard-related issue. You can either get the motherboard repaired or replaced by the brand service center. Getting the motherboard repaired could cost you anywhere up to Rs 10,000, whereas the cost of replacing the motherboard can go anywhere up to Rs 25,000.

If you ever notice multi-coloured or single-coloured vertical lines on your laptop screen, it may be a result of a hardware failure or due to damage to the screen. To try fixing it yourself, first unplug your laptop, hold the power button for 30 seconds and restart the laptop. If you continue to see coloured lines, the issue is probably with the LCD screen, which will need to be replaced from the brand’s service center. To be sure about the LCD screen problem, try connecting your laptop to another monitor and see if the issue persists. If it does, the issue is certainly in the LCD panel.

On turning on the laptop when you see the lights blinking and hear the fan working but if the laptop screen is blank and doesn’t display anything, this is again an indication of a faulty motherboard. The first thing to do is to transfer all the data to another drive to make sure your data is safe. Before going ahead and getting the motherboard repaired or replaced, you could try performing a hard reset (also known as a factory reset), which can mostly help in resolving the blank display issue.

Firstly, check if your laptop’s brightness level is set to maximum. If the display is still dim, try restarting the device. This could just be a system error that can be resolved by restarting the device. Also, check if the AC adapter cord is loose and firmly connect it to the outlet and laptop. If the issue still persists, it is mostly due to a failure of the LCD. Behind the LCD, there is an inverter board and backlight bulb which control the picture.

The inverter board converts the low voltage your laptop uses, into higher voltage required by the long bulb that lights up the LCD screen. If the inverter board or bulb fail, you will experience the problem of a dimmed display. Even if one of these two components fail, the screen will need to be replaced, unless the service center can help by just replacing the bulb. We wouldn’t recommend you try resolving it yourself, as this is more complex and you could end up damaging the circuit board and the backlight lamp. So, it’s best to leave this job to an expert.

Laptops are fragile and can easily break, especially with more and more thinner and lighter models being launched now. Some of the most common ways how a laptop is damaged include: when it accidentally falls and the screen cracks, when it’s held at an awkward angle or if you unknowingly placed something heavy on the laptop. Remember, a cracked laptop screen can affect the overall functioning of the device in some cases.

Since brands do not cover the laptop screen, it’s best to get your device covered with a protection plan in advance. Screen replacements are expensive and can cost you anywhere up to Rs. 15,000 but if you have the

After a long, hard day, you finally sit down to catch up on your favorite show. But when you hit the power button on your remote control, your TV screen stays black! You try pressing the remote’s power button again and again from every angle, but still, your TV has no picture. If this sounds familiar, you’ve likely fallen victim to one or more TV screen issues.

What causes a TV screen to go black? Software issues, loose connections, or backlight problems are usually behind black TV screens. Learn about each of these causes and get tips for troubleshooting them so you can get back to relaxing with your favorite TV shows, movies, and video games.

If your TV screen is black and there’s no sound, you’ll want to check for an LED light or a small indicator light that tells you the TV has power. If there is no power to the TV while it is plugged in, there may be an issue with the outlet or fuse box in your home. However, if the TV is on but the screen is black, the problem could lie with your TV’s software.

Unplug the TV from the wall, and, if possible, remove the power cord from the back of the TV to perform a soft reset. Wait 30 seconds, and plug the TV back into a working outlet to test it again. If you’re still having screen issues, you might want to bring in an expert — they’ll know how to fix your TV’s black screen.

If your TV screen goes black but the sound still works, the first thing to check is the input source to ensure it is turned on and operating correctly. This includes external devices like cable boxes, video game consoles, laptops, and streaming devices. Once you’re sure the input source is working properly and you have the right input settings, check the cable connections. In many instances where the TV screen is black but the audio works, poor cable connections could be the issue.

Whether you’re working with an HDMI cable, RCA (usually yellow, white, and red cables) set up, or another type of connection, you need to ensure the cables are seated properly and firmly into their connection ports. With a good connection, the cable shouldn’t feel loose or easily disconnect when pulled on or moved around. If all your cables have a snug fit but the problem persists, try connecting the device to another TV. If your TV screen is still blacked out, you may need new cables.

Some TV displays, such as LCD screens, use a backlight to illuminate the picture. If the backlight burns out or stops working, it will result in a blank TV screen.

To check your TV’s backlight, make sure your TV is on. Then, turn off the lights in the room and shine a flashlight on the screen. If you can see a picture with the flashlight, then your TV’s backlight is likely burnt out.

While you might be eager to learn how to fix a black-screen TV, a broken backlight does not come with an easy solution. The backlight will need to be replaced, and it’s best to get help from a professional with this task.

If repair costs are outside your budget or not worth it considering the age and condition of your TV, you may want to consider upgrading to a new smart TV. When you purchase a new TV from your local Rent-A-Center, you’ll enjoy free product service and repairs for the life of your agreement as part of our Worry-Free Guarantee.

You’ve run all the tests, checked all the ports, and ensured your TV has power, but your TV screen is still black! There could be a more complicated (and expensive) issue, so it might be time to ditch your old TV for an upgrade.

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!

These use a less common “SLP” (Super Low Power) panel, as well as the 7490. In addition to that, Dell also uses different iDP cables between “HD” (768p) machines and IPS FHD (BOE or LG). Sadly, this time, it’s not the same DP/N between multiple resolutions like the gov"t spec E7440 I had in production (the clue was it was mic only/no cam with the 768p iDP LCD. This would not pass to a private buyer unprepared to swap screens because it"s so dumb otherwise). I no longer use it because time got to it (as well as it"s nearly 10-year-old ORIGINAL battery; I tried replacing it, but the replacement didn"t work out). What you need depends on the original LCD.

NOTE: If you have a 768p unit and want to ditch the 768p TN LCD for FHD IPS, you will need to replace the LCD cable, and LCD - buy a used assembly/donor with the part to upgrade these screens, or match the part numbers.

Once you know which one you need, you’ll need to locate a panel from a reliable supplier. EARLY WARNING: the SLP screen can sometimes be more expensive to replace than a "normal (non-SLP)" LCD, as they are harder to come by. The minor difficulty of locating these may mean you will need to negotiate, wait for a sale to get the screen or buy a bum machine with a good screen (think unfixable BIOS locks, totally dead board, etc).

However, the issue with finding a donor is most people consider the LCD failing a "BER" failure (myself included!) due to the cost of the raw panel, and the time required to find one. It"s not unheard of for units with good screens to sell somewhat quickly because of how much the part can go for, especially if the underlying machine is a total loss otherwise. There"s a reason you see so many people let go of these when the LCD cracks!!! Seriously -- anyone who can fix these will not touch these "bad LCD units" for a reason, or they just want the motherboard/chassis parts. That said, if you"re dead set on trying you can find one, part numbers/parts can be found here.

As much as I hate to say this here, the 7480/7490 screen is often expensive enough it can be a difficult proposition as a "DIY" repair - really :(. You might be better off with a secondhand 7490 without an SSD or a small drive and moving your old drive over* (if you upgrade a secondhand unit, look for one without any seals and keep the original for a while just in case! DO NOT ASK THE SELLER!).

The parts cost situation on the 7480/7490 is often so bad, that if I broke the screen on my 7490 the only way (even for me) to fix it without an "economic BER" end is to shop around for a used assembly, a IPS FHD donor laptop, or a 4K panel (if compatible; I"d be tempted if I need a screen anyway) as mine was FHD out of the factory. For me, the criteria would be to get a stripped 7th gen unit with the right part, or a permalocked BIOS with a unknown password where there is no fixing it without a motherboard (no, I"m not saying how you permalock Dell BIOSes).

Installing the replacement is easy; disconnect the battery (8 captive screws on the bottom, reinstall the cover for support but leave the battery disconnected), remove the LCD bezel (snapped down and held with adhesive; you’ll ruin the tape on the bad LCD, but don’t worry about it), remove the tape and do not reinstall with new tape as it is not needed, install the new screen and reverse disassembly.

Buy a used 7490 with a FHD LCD, not the 768p LCD (BOE and LG are both good, but LG>BOE when possible), move your SSD over and sell your 7480 for parts. You can get one with a small SSD and swap it (think 128GB, especially if yours is 256+), or buy one where it was removed and carry your SSD to the "new" laptop. If your “new” computer’s SSD is larger, move the data, not the SSD.

Average cost: ~$150-200/i5 82/8350U+8GB, OR ~$250-300/i7 (8650U)+16GB. 8GB 8650U machines are a bit cheaper, but those are the two you want when possible. The RAM can be upgraded to 32GB, so don"t stress if you can"t get what you exactly want out of the box. NOTE: You may be able to locate one with the i7-8650U since they aren"t unicorn machines with the 7490 you need to be persistent to get. If you find one, it"s worth the extra few bucks for the "i7 tax".Nonprofits are your friend here, since you can cut a deal on one without an SSD. Don’t expect a low, low price but you can often do better on price. Essentially what you"re doing here is moving up to a newer system with a MARGINALLY BETTER processor (the main reason is 7th gen is 2C/4T and 8th is 4C/8T on ALL i5/i7 chips). The best part is because it’s just a better 7480, you’re still “at home” but on a better computer :-). The Dell logos are the ONLY COSMETIC difference.if you can get a 4K system for the right price, I wouldn’t blame you for saying yes. I did on my 8550U 840 G5, and I’m glad I said yes.

NOTE: WHEN THE SSD IS MOVED, you will need to use the Data Wipe option in the BIOS and reinstall Windows (technically you can just overwrite the SSD but taking it back to a RAW state is preferable as it takes seconds). Make sure you turn Bitlocker OFF before doing the move (if enabled) just in case you need to boot one more time, and backup your stuff to an external HD if you have to wipe the SSD.

To provide you more detailed instruction, you can also click ASUS Youtube video link below to know more about Troubleshooting for No display on LCD Monitor

Check if the signal cable (VGA / DVI / HDMI / DisplayPort) is wellconnected , and confirmed another end of the output cable has been firmly connected to computer input port (graphics card). Unplug and plug 2-terminals again to ensure all pins aren"t bent.

Check if the signal cable (VGA / DVI / HDMI / DisplayPort) is wellconnected and confirmed another end of the output cable has been firmly connected to computer input port (graphics card). Unplug and plug 2-terminals again to ensure all the pins aren"t bent.

If the model had attached with the power supply (AC-adapter), make sure the power supply has connected to the screen. Please check if the light of power supply is ON. If the light is NOT ON, change another power supply to test.

Are there any regional differences inpower specifications thatASUS LCD monitor supported (for example: If monitor was bought in Taiwan, can it be used in China or other countries?)

ASUS LCD monitor can support power specification: AC 100-240V. As long as within this voltage range, the display can work properly. However, please be noted that if you bought a monitor from another region, the power cord is not necessarily compatible to power outlet. Customer should replace the appropriate power cord or plug adapter in order to ensure normal power supply of the display.

1.2. THIS POLICY IS NOT APPLICABLE TO EITHER COMPANIES OTHER THAN TRENDFORCE AND ITS SUBSIDIARIES OR PERSONNEL NOT EMPLOYED OR AUTHORIZED BY TRENDFORCE AND ITS SUBSIDIARIES.

2.1 THE WEBSITE WILL COLLECT AND USE USER INFORMATION FOR PURPOSES SUCH AS MARKETING, CONSUMER PROTECTION, CONSUMER/CLIENT MANAGEMENT, E-COMMERCE SERVICES, FINANCIAL ACCOUNTING, CONTRACTUAL MATTERS, RESEARCH ANALYSIS, AND DATA PROCESSING. WHEN REQUIRED BY LAW, THE WEBSITE MAY ALSO PROVIDE PERSONAL INFORMATION TO NON-GOVERNMENT AGENCIES.

2.6. THE WEBSITE WILL USE THE COLLECTED INFORMATION FOR THE FOLLOWING PURPOSES, INCLUDING: IMPROVEMENTS TO ADVERTISING AND WEB CONTENTS; RESPONSES TO USERS" REQUESTS AND NOTIFICATIONS TO USERS ON NEW SERVICES, ACTIVITIES AND PRODUCTS.

2.7. THE WEBSITE WILL RESPECT ALL USERS" PERSONAL INFORMATION RIGHTS, FOLLOW THE PRIVACY POLICY GUIDELINES WHEN COLLECTING, PROCESSING, AND UTILIZING PERSONAL DATA, AND ADOPT PROPER SECURITY MEASURES TO ENSURE THAT ALL USERS" INFORMATION ARE KEPT SAFELY. THE WEBSITE WILL NOT SELL COLLECTED USER DATA TO ANY THIRD PARTY, AND STRICTLY FORBIDS ALL EMPLOYEES FROM MAKING PERSONAL USE OF SUCH INFORMAITON. TO PROTECT ALL DATA COLLECTED FROM CLIENTS, THE WEBSITE WILL ONLY PROVIDE AND USE INFORMATION WHEN AUTHORIZED TO DO SO, AND WILL KEEP PROPER RECORDS OF ALL SUCH ACTIVITIES.

THE WEBSITE WILL NOT DISCLOSE OR SHARE ANY PERSONAL INFORMATION EXCPET PER SPECIAL REQUEST OR WHEN PERMISSION IS RECEIVED FROM THE USER. OTHER EXCEPTIONS INCLUDE:

d. WHEN PARTS OR ALL OF THE WEBSITE"S BUSINESS HAS MERGED WITH OR IS ACQUIRED BY A DIFFERENT COMPANY, AT WHICH POINT THE WEBSITE WILL NOTIFY USERS OF WHEN THEIR INFORMATION IS BEING TRANSFERRED AND WHETHER A NEW PRIVACY POLICY WILL TAKE EFFECT.

5.2. COMPANIES THAT HAVE ADVERTISEMENTS DISPLAYED ON THE WEBSITE WILL STORE AND USE COOKIES IN ACCORDANCE WITH THEIR OWN PRIVACY POLICIES. ADVERTISERS AND THIRD PARTY COMPANIES WILL NOT BE PERMITTED TO ACCESS OR USE COOKIES OWNED BY THE WEBSITE.

b. THIS WEBSITE WILL NOTIFY YOU ON MATTERS RELATED TO YOUR PERSONAL DATA BY EMAIL, OR TRENDFORCE CORP. WILL NOTIFY YOU BY OTHER MEANS (SUCH AS VIA TELEPHONE). CLIENTS ARE FULLY RESPONSIBLE FOR PROVIDING AN UPDATED, VALID, AND DELIVERABLE EMAIL ADDRESS THAT CAN RECEIVE NOTIFICATION EMAILS FROM TRENDFORCE CORP.

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:

The first step into repair is to find the root cause of the issue. As backlight failure is a very common issue, this is the first thing to test. To do so, the easiest way is to power on your screen, put a flashlight very close to it and check if you can see the image through. The image would be very dark, like turning the brightness of the screen very very low.

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).

Using a multimeter, we can confirm that the strips are indeed set in series, so now we have to test each strip individually. Professionals use LED testers such as this one (about 40$ on amazon) but as I didn’t had one at the time, I decided to make one, McGyver style!