What to do if there is a dead pixel on the monitor

Table of Contents

What are the types and types of dead pixels?

Depending on the color of the broken pixel, you can understand what type it belongs to and whether it is possible to cure it.

there, dead, pixel, monitor

Hot, Extinct & Stuck Pixels (from left to right)

  • 1st type. white point. Also called “hot pixel”.
  • 2nd type. black point. Other names for “dead pixel” and “dead pixel”.
  • 3rd type. colored dot. Such is formed when one of its subpixels fails. It is also called “stuck pixel”.

Theoretically, only a stuck pixel can be cured on your own at home. on this later.

Programmed-mechanical method of treatment

If the treatment of dead pixels did not help after using the first 2 methods, then you can try to use them at the same time. But it is better to try all the same starting with the first method, since it is the most loyal.

Do not forget that you do the treatment of dead pixels at your own peril and risk, because there is a possibility that you will make it even worse. Therefore, if the defective points are not very striking to you and do not greatly interfere with your work, then it is better to leave everything as it is. In addition, sometimes it happens that they disappear by themselves. Oh miracle!

Check for dead pixels

How to check the screen for dead pixels? This is the first question that came to you when you learned about the existence of such. In fact, the whole procedure for checking the monitor comes down to a thorough and careful examination of the screen.

Check for dead pixels (instruction):

  • Wipe well the dust on the screen so that there is no visual interference.
  • Set the screen to the optimal resolution (native). If suddenly you had something different.
  • Inspect the screen, including the solid color background (black, white, red, blue, green, yellow) in turn:
  • You can use simple pictures that you prepared in advance.
  • You can use special utilities, for example: Nokia Monitor Test, Dead Pixel Tester (http://dps.uk.com/software/dpt), Monitor Test (http://tft.vanity.dk) and others.

Dead Pixel Treatment

Quite an adequate question “Is it possible to cure broken pixels?” And the answer is yes. Or rather positive than negative. This will be more correct. Because not everyone is able to remove unwanted dots on the monitor. And not the fact that this is forever.

In general, there are 3 methods for treating dead pixels:

  • Program
  • Mechanical
  • Software-mechanical

Mechanical method

The so-called “mechanical pixel massage” consists in massaging the desired area with something not sharp, for example, an ear stick, but better with a stylus for a PDA, if available. Press not hard, but hard enough to cause streaks to appear on the monitor matrix. This should be done within 10-20 minutes with the screen on. If you managed to reanimate the point in this way, then I sincerely congratulate you.

What is a dead pixel?

Let’s not get into the technical details, because most of you don’t need it, and some of you don’t want to read any further. Therefore, I will try to explain in normal human language.

A pixel is a point on your monitor or display that can take on any color. If you have a monitor resolution, for example, 1024×768, then this means that your monitor has a whole field of dots. 1024 dots wide and 768 dots high. 786432 points in total (according to the formula for the area of ​​a rectangle). Thus, on your monitor there are almost a million (there are many more, for example 4K) multi-colored dots, from which the image is formed.

A dead pixel is a defective pixel that does not work as expected or does not work at all. Instead of the expected color, the point can be black, white or permanently lit in one color (red, green or blue).

Naturally, broken pixels interfere with computer work, annoy, enrage, distract, and so on. Therefore, it is better to immediately check the purchased device for the presence (or better, the absence) of dead pixels.

If you notice such incorrect points too late, then it is not a fact that you will be able to return the device under warranty. Because some display classes allow for a small number of defective pixels.

Programming method

To cure dead pixels, you need to use special utilities. Some of them are paid, some are free. The bottom line is to launch the utility, which is a small window with dots constantly flickering in different colors. And to act with this window on the place with bad points, simply by dragging it onto them and leaving it there for 20 minutes. Examples of such utilities: JScreenFix, Bad Crystal and others.

UndeadPixel will fit most

Go to the official website and download the program installer. I recommend the installation version, not the portable one.

In the main window of the program, it is proposed to start finding dead pixels by filling the screen with solid colors: red, lime, blue, white, black and yellow. Different broken pixels will show up on different backgrounds. If you already know where your pixels are, then immediately proceed to restore.

UDPixel works like this: a square appears in which the colors change quickly, i.e. there the pixel recovery algorithm works, and we need to move this square to the problematic place on the screen. In the “Undead pixel” section, you need to set the parameters:

  • Flash Windows. the number of squares, i.e. how many problem areas are you going to treat at the same time
  • Flash size. the size of one square in 1×1 or 5×5 pixels. Since it is very difficult to set a 1×1 square to exactly 1 pixel, a 5×5 area is suitable for restoring even one pixel.
  • Flash interval. pixel refresh rate by algorithm. The shorter the time, the faster the speed. Maximum speed at 3 ms.

Click Start and move the flickering square (s) to the defective spots, watch the video below. When the pixel starts blinking, then this is already an application for victory, just leave it for a longer time. If everything is unchanged, then we select the maximum speed and wait until the pixel disappears. In the worst cases, it can take 10 hours, there is no point in waiting any longer.

The peculiarity of UDPixel is that during pixel recovery, you can continue to work if the squares are not large and do not interfere.

Dead pixel recovery software

There is no need to talk about high-tech methods used only in laboratories. Is it possible, in principle, to get rid of multi-colored dots at home? Yes it is possible! And I was convinced of this myself. There are two ways to eliminate dead pixels. software and mechanical.

Restoration occurs due to the rapid change in the colors of adjacent pixels. Thanks to this process, a large amount of energy is supplied to the subpixels and they come to life. This technology promises to recover from 55% to 90% of “stuck pixels”. True, each case may take a different amount of time, you will have to experiment if you cannot remove the damaged pixels with a raid. Experiments mean changing the speed of changing colors and running time of the program.

The recovered pixel may get stuck again after a while, especially in hot weather. Then the treatment process will need to be repeated. In some cases, such a pixel cannot be completely cured.

Recovering dead pixels on screens

Summer has begun, heat and new fun. I have a one-room apartment and, think for yourself, I decided to put a second computer in the kitchen with a 19-inch TFT monitor! And where does summer and broken pixels have to do with it? And here’s what. 36 degrees outside, the stove, oven and high humidity did their dirty work. a couple of dead pixels appeared on the monitor.

Dead pixels are constantly glowing or vice versa. non-working dots or parts of dots (subpixels) on the monitor. If the pixel does not work at all, then it always looks black and is noticeable only in white and light colors. This is the most harmless kind of dead pixels, but it is practically impossible to treat.

The most common broken subpixels are when a bright red, blue, green, yellow, turquoise or magenta dot is constantly lit. They are also called stuck pixels. If such a pixel comes out in a conspicuous place, it is very annoying, especially the red If all three subpixels are buggy at once, then a white dot will glow on the screen.

By the way, defective pixels can both appear and disappear by themselves. On my main monitor from the purchase itself, there were three multi-colored dots in the middle of the screen. When I bought them, I either did not notice them, or they appeared already at home, I don’t know. But I did not bother on this score, because they were absolutely invisible to the eye, if not peered. For 4 years of working with this monitor, I never noticed them, although they were in the middle of the screen.

I think this is due to the fact that my monitor is on the MVA matrix, and not on the common TN. Probably, the specificity of the matrix is ​​such that small defects are not noticeable. So, I recently decided to check if these pixels can be removed in a new way. Began to check. but they are not! All went somewhere in formation

JScreenFix for browser

This is not a program, but just a website, a free service on the Internet. Thanks to this, JScreenFix can be run on any device with the Internet: computer, laptop, tablet, MacBook or LCD panel.

Scroll down the page and click the Launch JScreenFix button. The JScreenFix script restores dead pixels in the same way as UDPixel, only without the ability to change the parameters, and it will not work at this time to work at the computer.

You need to move the iridescent square to the problematic pixels, and if they are outside the browser window, then switch to full screen mode by clicking the green button. Watch the video how Undead Pixel and JScreenFix work:

Recovering a dead pixel “manually

Software methods are completely safe as opposed to “physical”.

We take an ear stick or pencil with a grater on the back end or any other soft blunt object.

Find our “stuck” pixel and set the tool on it.

We make light pressure until the first “streaks” appear and release

Checking. If it doesn’t help, add “newtons” and repeat.

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Then we move on to circular motions. Make the radius as small as possible. It is necessary to perform movements in both directions.

If it doesn’t help. Make light pressure on the broken pixel and move the tool up a few pixels. We do the same in all 4 directions, then back to the center (broken pixel)

If it does not help, then we take a not sharply sharpened pencil and through a cloth napkin (so as not to scratch the surface), we repeat all the exercises.

If this did not give results, then it is necessary to combine the software and “physical” methods.

Bad Crystal. dead pixel recovery and prevention

All software methods use fast color change in the “sore” area. The probability of broken pixels returning to a usable state, more than 50%.

Bad Crystal is a paid program. The demo version has a pretty good tool. We will use it.

Download, install and run the program. Click on the arrow circled in a red rectangle

In the opened window with Activation, click “Continue”

If you want to restore dead pixels on the screen of your phone, TV or game console, press the same arrow and select your product. We’ll stop at a computer monitor. Click “Fix Now”

In the trial version of the program, it is possible to use only the CCM mode with an efficiency of more than 55%. In the activated version, more efficient SMF and CFV modes are available with a recovery rate of up to 80%. PPM is a prophylaxis regimen. It is necessary to run a couple of times a month in case of successful restoration of the dead pixel to life.

Hover the opened window over the broken pixel and wait 10 minutes. Checking. If nothing has changed, increase the speed (press Speed ​​Up) and leave it on the “sore spot” for 20 minutes.

Checking. We increase the speed to the maximum and leave it on for 30 minutes. If it does not help, leave it overnight. If this does not help, go to physical methods.

If the broken pixel comes to life, then the program developer recommends to carry out preventive maintenance (PPM mode) 2 times a month.

We select the PPM mode. In the window that opens, click “Manual Mode” and minimize all windows

The screen is “massaged” with different colors. Wait for completion and close the program. If the program does not close, use the task manager and remove the selected tasks

For prevention, you can also use the following video on which the “massage” is recorded.

You need to download, unpack, run and point to the disinfected place.

Recovering dead pixels

Hello, friends! With LCD monitors entering the mass market, free space began to appear on the desktop), the background radiation noticeably decreased and everyone breathed a sigh of relief. However, liquid crystal monitors, in addition to huge positive sides (diagonal of 21 ″ and more, absolutely flat screen, the possibility of widescreen performance), can also have “negative” points, called dead pixels. What it is and how you can try to restore these points, I’ll tell you below.

A little bit about dead pixels

In a modern LCD monitor, an image is built from dots called pixels. The word “pixel” itself comes from the abbreviation. pix element or piсture cell.

The number of pixels is determined by the resolution of the monitor. For instance:

Each pixel consists of 3 subpixels: red (R ed), green (G reen) and blue (Blue). Hence the abbreviation R G B.

To set a specific color to a pixel, you must specify the brightness values ​​of 3 subpixels. Each value is indicated by 2 digits in hexadecimal format (00 minimum brightness, FF. maximum brightness). For example: black. 00 00 00, white. FF FF FF, red. FF 00 00, etc.

There are two types of “broken pixels”: “dead”. which have little chance of restoring (they are permanently white or black) and “stuck”. which burn in a certain color. It makes sense to restore these.

Before “curing” broken pixels, you need to determine exactly where they are. For this, the AIDA64 program or any other program with a test for monitors is suitable. Download, install. The “trial” version is also suitable for us.

The UDPixel program described below is also perfect.

Launch and open the “Service” menu. Select the item “Monitor Diagnostics”

If you know what tests you need, leave the birds only on them, if you don’t know, leave everything as it is and start the test by clicking the “Run Selected Tests” button. Next, change the images on the screen with a space and look out for these very broken pixels.

They are especially noticeable when viewing a picture of a completely filled screen in a certain color. (My former boss used a magnifying glass to find dead pixels)

Why Sometimes You Can’t Return Your Monitor Under Warranty?

  • 1. in which there are no dead pixels and, if any, a warranty replacement is carried out
  • 2. allows a certain number (up to 7) of dead pixels (depends on the diagonal of the monitor)
  • 3. up to 70

The most common is the 2nd grade. This characteristic should be indicated in the specification for the monitor. If not specified. 1st class monitor.

Therefore, if your number of dead pixels does not exceed the acceptable in its class, the probability of product replacement is very low.

We decided on the location, we are trying to restore.

UDPixel. free dead pixel recovery utility

This software product is free and allows you to work almost comfortably at your computer while performing recovery.

In the Flash Windows field it is possible to select the number of “mustard plasters” equal to the number of dead pixels. For example, take 5 and click Start.

5 flashing dots will appear on the top left of the screen

Each point must be moved under the broken pixel for 10 minutes. If it does not help, bet on 20, 30 or more.

The beauty is that you can choose the size of the “mustard” 1 X 1 pixel or 5 X 5 pixels. Thanks to this, you can not distract from work while treating the monitor. Unless of course it annoys you.

In order to stop the treatment, you must press “Reset”

UDPixel also allows you to conveniently test the monitor by clicking on the corresponding colors in the main window of the program. over, it is possible to select any color by clicking on to the right of the yellow color

The function run in the “Run cycle” with the indication of the number of cycles will help to carry out the monitor’s maintenance 2 times a month.

If the software does not help, you need to go to physical or “manual” methods.

In this article, we met with you already a rare defect. broken pixels. We figured out why it can be difficult to hand over the monitor under warranty.

Acquainted with software (Bad Crystal and UDPixel) and “manual” methods of treatment.

Therefore, the main and most reliable means of dealing with dead pixels is to check the monitor immediately after purchase and return if necessary.

Thank you for sharing the article on social media. All the best!

A little about pixels

Before we start analyzing dead pixel recovery, let’s figure out what it is. First, the basic concept. Pixel. it is the small part that composes the image on the LCD screen. It consists of three components (subpixels) in red, green and blue.

  • Broken (hot, stuck). Either one or two subpixels are faulty. What does a broken pixel look like? The dot can be red, green, teal, yellow, magenta, or blue. May appear black in some images. Less often, all three subpixels do not work, then the square glows white. Dead pixel recovery is possible!
  • Dead. This is the kind of defective pixels that, unfortunately, cannot be repaired. The dots do not light up in any color, they look black on any background. Solution to the problem. in screen replacement.


The restoration of pixels on the monitor is successfully obtained through this free virtual service. Its plus is that it is available on any device with Internet access. not only on a PC and laptop, but also on a smartphone, TV, e-book or tablet.

JScreenFix acts like the previous program. There is only one difference. recovery parameters (frame rate, exposure size) cannot be adjusted here independently. In addition, during the “cure” JScreenFix will not work with the device. If the problem does not enter the browser window, then the service can be expanded to full screen.

The creators of JScreenFix also recommend that you periodically launch their product to prevent the problem.

“Massage” monitor

Many users point out that the most effective way to recover broken points. mechanical. Let’s imagine the algorithm for “massaging” a pixel:

  • Take a blunt, soft object. a cotton swab, a pencil with an eraser at the end, etc.
  • Press lightly on the broken pixel until the first streaks appear.
  • If there is no effect, then apply harder pressure.
  • Did not help? We make circular movements with an object along a point. to the right and left. Repeat the steps several times.
  • The next procedure: press on the broken pixel, then drag the tool up and then back. Repeat the movement down, right, and left.
  • In case of failure, many turn to a risky step: they repeat all the above actions with a sharpened pencil through a cloth so as not to scratch the screen.
  • Sometimes combining mechanical and software methods helps a lot. The simultaneous work of Bad Crystal and massage of the problem point with a cotton swab for 15 minutes will be effective. The program is then left to function on its own for 10 hours.

Reasons for the appearance

What causes broken pixels on the screen? Experts believe that the root of their appearance. in the very technology of manufacturing matrices for LCD screens. The pixel is small and unstable, so any manufacturing defect can lead to its inoperability in the future. The reason may be accidental ingress of dust, impact on the substrate with crystals. washing, heating, lithography.

Hence, no microprocessor technology can guarantee the output of completely non-defective crystals. We can say that matrices absolutely free from low-quality pixels do not exist. One or two dead pixels. the norm for almost any screen. It is considered a problem when the number continues to increase.

The appearance of dead pixels on the monitor can provoke the following:

  • Excessive heating of the device.
  • Excessive cooling of the device.
  • Staying near powerful sources of electromagnetic fields.
  • Physical impact on the screen. blows, knocking, falling, pressing, etc.

Dead pixel recovery: causes, troubleshooting, tips

You find that something is wrong with the monitor of your favorite computer, laptop, smartphone, TV or tablet. Namely. one or more white, green, red, or blue dots appear. What is it? There are broken pixels in front of you. The problem is small, but still unpleasant. Even a couple of such points are not encouraging, especially if the screen is small. Way out. recovery of dead pixels using certain programs or mechanical. How exactly to “cure” the screen, we will share with you further.

Recovery on a computer

“Treatment” of dead pixels on computers and laptops also occurs in two ways: mechanical and software. How do utilities help? The program quickly changes the colors of adjacent pixels. This process leads to the fact that more energy comes to the damaged subpixels, as a result of which they “come to life”.

As practice shows, programs are effective in 50-90% of cases. However, it is not always possible to help a defective pixel the first time. You need to experiment with the running time of the application, the speed of changing colors to achieve the fastest effect.

Don’t assume that “cure” will help you once and for all. The problem may recur, especially in hot weather. Then the restoration of dead pixels on the monitor will have to be repeated.

Below we present the most popular programs for “treatment”.

Recovery on TV: method number 3

What is the simplest dead pixel recovery on a TV? This is the delivery of the device for warranty repair or writing an application for its replacement.

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Is it possible? Not everyone knows, but even such a small defect (one faulty square on the monitor) is already a reason for warranty service or replacing the device with a working one.

Pixel healer

Pixel Healer [Windows] is a program that quickly displays different colors on the monitor to repair dead pixels and blend primary colors.

You can set the preferred amount of time for the program to run before it automatically closes. In addition, you can adjust the blinking to a specific area of ​​the screen rather than the entire monitor.

Be careful when running this kind of program. It is not recommended to look at the monitor while it is running. Flashing colors can cause epileptic seizures. Instead, start the timer as mentioned earlier and after the process is complete, go back to your computer.

It should be noted that this program does not detect dead or dead pixels. She’s just trying to fix them.

Pixel Repair

Pixel Repair [Windows]. the program works similarly to Pixel Healer, but it is able to find dead pixels, then fix them.

How to fix or restore dead pixels on your monitor

Dead and broken pixels are a nightmare for any user. Luckily, we know how to fix dead pixels on a monitor. With dead pixels, the situation is more sad.


JScreenFix [Web Browser] is a free site that guarantees dead pixel fixes with a 60% success rate. The site is powered by HTML5, so you can open it through any web browser on your computer.

JScreenFix triggers flashing of different colors in specific areas of the monitor. You can move the flashing rectangle around the display area.

Unfortunately, the program is limited to the web browser. If the dead pixels are outside the browser window then you cannot fix them with JscreenFix.

UndeadPixel: a versatile utility

Download the full version (installable) from the official site, it has more features, it works more correctly. When the program starts, the user will be prompted to scan the monitor to find dead pixels. The screen will be filled with different colors, from black to red and yellow. Pixels are different, and each will be visible against a background of a certain color. We found out where all the pixels are, now you can start the recovery procedure.

The program launches a special recovery algorithm, visually it is a small square with a quick change of colors inside. We set it on the broken pixels and set the parameters in which we set the number of squares simultaneously working on the screen (Flash Windows). We also set the size of the square. on average 5×5 (Flash size), and set the refresh rate (Flash interval).

We start the recovery, put a square on the broken pixels, wait for the pixel to blink, notifying that the recovery is over. It is better to set the maximum speed and time, sometimes the recovery takes several hours. During the procedure, you can safely work at the computer, the program does not interfere, and does not require a lot of resources. There are problems that cannot be restored, if the broken pixel does not disappear for more than ten hours, then it makes no sense to wait longer.

Screen Utility

Screen Utility [Mac]. This utility is available from the Mac App Store. The program recognizes any dead pixels on the display, and then tries to fix or restore them.

What are dead pixels

In all LCDs, the image is formed from a grid of pixels. They are made up of three separate subpixels in red, green and blue, which are responsible for full color image formation. Each subpixel has a transistor that controls it on and off.

It looks like a broken pixel on the screen / overclock.net

Even the matrix of a conventional HD monitor contains over 6 million subpixels, and in 4K displays their number reaches 37 million. With such a huge number, some of the transistors can malfunction. Then certain subpixels remain on or, conversely, off.

Programming method

The method consists in the cyclic output of rapidly changing images, which, due to frequent color changes, increase the chance of returning the hung pixels to the ability to switch again.

There are many options for implementing this method through utilities, online services, and even YouTube videos. They can be used on a computer as well as on a TV when connecting a PC with an HDMI cable.

  • Bad Pixel is a professional paid utility for Windows, the creators of which promise to remove defective pixels in just 10 minutes.
  • DeadPix is ​​a universal program for Windows and Android that helps you find and then fix problem pixels using color cycling.
  • PixelHealer is another utility for Windows. Eliminates stuck pixels by fast flickering RGB colors.
  • JScreenFix is ​​an online service to run on computer, TV and mobile devices. Outputs an area with digital noise that can be moved to the desired area of ​​the screen.
  • PixelFixel is a 12-hour YouTube video that is suggested to run and leave overnight. Attention! The colors in the video change at a very high rate and can cause an epileptic seizure. Do not look at the screen, but rather turn it to the side.

How to check the display

You can visually determine the absence of defective pixels upon close examination on a solid white, black, red, green and blue background. To do this, you need to download such pictures to a USB flash drive and play them on the device you like. If none of the dots are out of the general color, then everything is in order with the screen.

Another option is to use special software if you can run it. In fact, these are the same color pictures, but in a more convenient format for applications or online services.

  • Dead Pixel Tester is a simple open source utility for Windows. After starting, you need to select a mode and carefully look at the screen.
  • InjuredPixels is another free Windows app. Colors are switched by mouse or using arrows.
  • Dead Pixel Buddy is an online color checker tool. Works in any browser, including mobile ones. Don’t forget to enable full screen mode.
  • LCD DeadPixel Test is another online service. Choose a color, expand the window to full screen and check.

How many dead pixels are allowed

It seems logical to replace a computer monitor or TV with dead pixels, but manufacturers do not consider the latter to be a factory defect. When you contact the service with such a complaint, you will most likely be denied service.

Dell Dead Pixel Policy / dell.com

Different suppliers have their own standards for the number of defective pixels, depending on their location, resolution and display diagonal. So, LG considers up to 10 stuck and 3 broken pixels on 20-inch screens to be the norm. Samsung has 7 dead pixels for monitors, while Dell has 1–6 stuck and 6–13 bit pixels, depending on the line of displays.

How to check a monitor or TV for dead pixels and get rid of the problem

You will need a free app, a Q-tip, and a little patience.

How to remove dead pixels

Since black pixels are the result of damage to the transistor, they cannot be repaired without replacing these components. And this is almost unrealistic even in laboratory conditions. The situation is different with colored dots, which appear due to freezing of subpixels. You can try to remove them.

What pixel defects are there

Any abnormal pixels visible against the general background are called broken, but this is not entirely correct. Really broken or dead pixels are only those in which the transistor is out of order. They do not glow with any color and just remain black, falling out of the matrix grid. Clearly visible on a white background.

Hanging pixels on the left and right, broken ones in the center / digital-boom.ru

There are also frozen or stuck pixels. these are red, green, blue or white dots that are clearly visible on a black background. They occur when subpixels are stuck on a color update.


Another program suitable for diagnosing computer monitor matrices is IsMyLcdOk. It is also free to download and does not need to be installed. Verification instructions appear on the screen after the first launch.

The check is started with 4 keys. from F2 to F5. In the list of available testing modes, there is a display of colored stripes, rectangles, vertical or horizontal lines. In addition to standard tests, you can display a monochrome or gradient image.

Dead Pixel Tester

One of the most popular monitor testing programs is Dead Pixel Tester. You can download it from the official website.

To check, follow these steps:

  • Launch an application that does not require installation, and select the appropriate mode in the Pettern section and the color using the Color Selector button.
  • If necessary, set the mode change using the Auto Color Cycle option.
  • Check if dots appear on the screen that do not match the color of the picture.

The Exerciser function, activated by clicking on the corresponding button, allows you to find defects in a specific part of the screen. It creates a rectangular area that can be dragged around the screen looking for dead pixels.


To check matrix defects on this resource, just press the test start button and select one of seven types of diagnostics and its variation.

Important: unlike most other sites, Monteon.ru does not use a static image for testing, but a looped video. Therefore, with its help, you can not only find defects, but also control the rate of update of pixels on the screen.

How to check the monitor for dead pixels and fix everything

We will tell you how to check the monitor for dead pixels programmatically or using special services. We will also show you how you can cure the pixels and return the display to its original appearance.

One of the most common computer monitor problems is the appearance of individual dots on the screen, the color of which does not match the picture. The reason for this is damage or malfunction of the screen matrix, the smallest element of which is considered to be a pixel. This term is called an indivisible rectangular or round object with which an image is formed.

Allowable number of dead pixels

According to the ISO13406-2 standard, a certain number of defective items are allowed for each monitor. Therefore, even if checking the monitor for dead pixels showed their presence, this will be considered the norm in such situations:

  • the product belongs to the 4th class of quality and can have up to 50 “hot” pixels, up to 150 “dead” and up to 500 with other types of defects;
  • the matrix is ​​released in class 3, which allows the presence of up to 5 permanently on, up to 15 all the time not working elements, as well as up to 50 pixels with other malfunctions;
  • monitor quality class. the second, and up to 2 “hot” and “dead” pixels and up to 5 “stuck” pixels can appear on the screen;
  • first class monitor. there should be no dead pixels at all.

Online services for verification

If you cannot download and run the utility (for example, due to restrictions on downloading and running on a working PC), you can check the monitor for dead pixels online. There are quite a few sites that allow you to find defects, but among them there are two of the simplest and most convenient to use.


Vanity monitor test

Another popular service that allows you to quickly detect problems with displaying a picture on the screen. To run the utility on a PC, you need an installed Adobe Flash Player and a supporting browser. To start checking, click on the HTML Window inscription.

The modes in the online service are selected using the drop-down menu at the top. And you can use it to check dead pixels not only for a computer monitor, but also for a laptop screen, tablet and even a smartphone.

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Checking the monitor for dead pixels: 2 ways to check it yourself

The monitor is an indispensable attribute of the computer user. Buying expensive equipment, everyone wants to get a durable tool with clear graphics and fine detail.

However, there are frustrations. incomprehensible points that do not respond to changes in screen color and are great annoying. What to do when a defect is found and is it possible to return the display if a warranty card has been issued. the answers are set out below.

Before the purchase

If the resolution is obtained, you can choose one of the options for how to check the monitor for dead pixels:

  • visual inspection is an unreliable method, since it is difficult to determine “by eye” the existence of non-working components. If other methods are not available, it is recommended that you bring a magnifying glass with you to help you better see every inch of the display;
  • loading of contrasting monochromatic pictures from a previously prepared flash drive. The method quickly reveals such flaws, if they exist, they will certainly appear;
  • application of verification software developments. Unmistakably indicate the location and status of the breakdown.

Checking the monitor for dead pixels using the program can be done while at home or in the office. Even displays of the highest category often acquire such shortcomings over time, although before that they functioned without complaints. There are tons of tools on the web that you can use for free. These include:

  • DeadPixelTester. checks without installation;
  • Is My Lcd Ok. launched by means of the F function keys;
  • Monteon. a resource without an installation file in an online format;
  • VanityMonitorTest. do not need to download, but you need a flash installer.

If a non-working or stuck element is found on a new device under warranty, this does not mean that it will be accepted for exchange or refunded. ISO13406-2 standard defines the minimum threshold for damaged dot formations, depending on the display class.

What is a dead pixel on the monitor

This is a bright, or, conversely, non-illuminating point, which becomes visible when the spectral background changes. By the way, not only whole segments are damaged, but also their components, in which case they shine in red and in a different color. They appear

  • for various reasons, the fundamental ones are:
  • physical influence. strong pressing on the screen, hit or other force damage;
  • unfavorable environment. high humidity, heat, sudden temperature changes;
  • fatty fumes and other conditions unusual for technology.

How to check the monitor for dead pixels

This procedure is easy to perform at home or contact a master. Since the process does not require special knowledge in computer technology, you should not spend money on a service, it is easy to identify a defect yourself.

How to remove a dead pixel on the monitor

Before proceeding to troubleshoot the error, it is important to understand why micro-squares fall out of order. A pixel is the smallest particle of red, blue and green colors. From these segments, graphics are formed that cover the entire spectrum.

The illuminated components operate on a transistor component that controls the color rendering process. If the component is broken, the segment goes out and gets black on the screen. Such a pixel cannot be restored in any way. Consoles that it is barely noticeable and, in principle, not annoying.

If the point is white or another color. not all is lost.

How many dead pixels are allowed: table

To understand how effective treatment will be, it is important to understand the severity of the problem:

  • 1st. luminous snow-white point, easily detected against a dark background, it is possible to restore.
  • 2nd. faded pix, visible in the shades of the light spectrum. “Recovering” is impossible.
  • 3rd. the “hovering” particle is highlighted in a varied palette, from blue to poisonous red. but there is a chance to use it.


There are many software solutions used to activate a stuck pixel. Among the assortment, the most popular will be:

  • Bad Crystal is shareware with a 30-day trial mode. Although the properties are limited, there is enough functionality to fix errors, which is what is needed in this situation. And if you use the old modification and remove the darkening of the active program window, you will be able to use the full potential. Suitable for smartphones, TVs or consoles.
  • JScreenFix. the application is launched through Java, which should be taken care of in advance. It detects damaged points for free, but it will require payment for activation. The well-being of the user’s own technique and the user’s nerves is much more important than the cost of paying for the matrix adjustment.

Manual way

In the case when it is not possible to use utilities, it is worth trying to act mechanically. Recommended methods include:

  • circular movements of a massaging nature to the area of ​​the point. To do this, the monitor turns off, and to find the right place, the area is marked with an erasable marker. Be sure to use a soft tool, such as a cotton swab;
  • disconnecting the monitor from the network for 5-6 days to remove static and accumulated voltage from the transistors. Such a reboot will help to activate the performance of the stuck subpixel.

Broken pixels appear on both new and long-running monitors. They deteriorate singly and in groups, creating squares, lines, and other geometry. You can identify the malfunction yourself if you use the methods mentioned in the article, and you can get rid of only two of the three types of points. It is highly likely that the problem may return over time, and it is not a fact that the next time it will be possible to fix it in the same way.

To make the purchase of a monitor a joy, it should be tested immediately. This is the interest of the client himself. Factory and current defects in the work of pixels do not always fall under the guaranteed return, since the manufacturer has the right to refer to the current threshold for the minimum value of damaged particles.

Eliminate dead pixels

In order to get rid of damaged pixels on the monitor, you can use software such as Bad Crystal. This is a completely safe program for the monitor, which runs it in colors with a high frequency in a certain place where a dead pixel is detected, as a result, you can get rid of it. The opening hours will depend on the specific situation. In some cases, a few minutes is enough, and sometimes it takes several hours to eliminate the damaged areas. Now there are sites that have applications for recovering damaged pixels, just go to the resource, open a window and place it on the damaged area, after which it remains to wait for the result. There is no way to get rid of black or burnt pixels. But, unlike other types, they are less noticeable, so during the operation of the monitor there will be a minimum of inconvenience. For new LCD monitors, black dots are unacceptable, so it is better to skip this option and ask for a different monitor or model. If it is used, then it is necessary to look at where the defect is so that it does not interfere with work.

The mechanical way to eliminate defects is to use a cotton swab, which must be driven in a circle where the defect will be detected, periodically pressing on the defective pixel. In many cases, this method turns out to be quite effective and allows you to get rid of defects without using software. To effectively eliminate defects, you can use both software and mechanical methods, then the likelihood of success will be higher.

If the software and mechanical methods do not work, then it will not work to eliminate the damaged pixels.

What is a pixel?

A pixel is the smallest particle of an LCD monitor screen, despite its miniature size, a pixel has the property of color rendition and color reproduction, which allows you to get a high-quality color image on the monitor screen. The monitor screen consists of a huge number of pixels, which, if damaged, become broken and impair the comfort of using the device. In fact, in absolutely every monitor model, there are initially dead pixels, but they, as a rule, do not affect the comfort of using the device.

To check the screen for dead pixels, the Nokia Test monitor program is used. During testing with this program, the device is run by color, so during testing you can see defects in the form of dead pixels. It is not recommended to buy a monitor with such defects. When buying a new monitor, defects may not be found, but the first dead pixel often appears after a while.

What to do if there is a dead pixel on the monitor

Owners of LCD monitors and other equipment equipped with screens often face such a problem as dead pixels, which are a defect. The appearance of a dead pixel is constantly the same and does not change when the picture on the screen changes. They are of several types: white point, dark point, colored point. The first and third types can be eliminated, but the second one will definitely not work. When buying an LCD monitor new and, moreover, a used one, it is imperative to check it for dead pixels, which are very common in used models, but also in new ones.

What monitors often have dead pixels

First of all, dead pixels are found on inexpensive monitors made in China, which are already on sale with many defects; after a few weeks of active use, the defects increase. Such defects are quite rare on monitors from well-established companies. In any case, it is imperative to check the screen using defect detection software. It is not always possible to visually find dead pixels, but if it is not possible to check the monitor using the program, then it is necessary to change the image on the monitor, then it will be possible to find damaged pixels, which, with certain screen colors, may be invisible to the naked eye. You need to inspect the screen completely, even in the corners.

Damaged pixels. this is a common occurrence for LCD monitors that have already been in use. They most often appear as a result of mechanical impact on the monitor screen, shock, pressing, dropping and after a certain period of use.

Pixel Manufacturing Technologies

Pixel production technology differs depending on the type of the screen matrix. A pixel consists of many LEDs, the number of which varies greatly depending on the resolution and screen size of the monitor. The pixel uses LEDs of different colors, while the white balance must be observed. Modern monitors are equipped with SMD blocks, which are produced in a fully automatic mode, thanks to which it is possible to avoid low-quality products, often obtained by manual assembly.

Thanks to the modular assembly, screens of modern monitors can be of different sizes, while the image quality is maximized. The pixel consists of RGB LEDs: red, green and blue. The quality of the image on the monitor depends on how many pixels are in one specific size.

When buying an LCD monitor, you should pay special attention to the presence of defective pixels. If one or more such defects are found on the screen of a used monitor, then the first step is to determine what types of defects are, if these are black dots, they will remain forever and can affect the comfort of using the monitor. If these are points of the first and third types, then after a little effort in most cases it is possible to eliminate them.