Nowadays, for any user of modern household and computer equipment, the phrase “dead pixels” causes nothing but a headache and a bad mood. But what is it really and how scary is it to be the “lucky” owner of equipment with these same dead pixels?

First, let's figure out the principles by which modern TVs and monitors work. They form an image using many dots, which are called pixels. When they change their color, the image on the screen also changes, and we see the picture formed from these dots. In modern monitors, a matrix is ​​installed, called active - in it, a separate thin-film transistor is responsible for controlling each pixel (that is why such screens are called TFT, from English. If one of these transistors fails for some reason, we can observe the phenomenon which is called a dead pixel on the monitor.

Due to a technical malfunction of the transistor, such dots do not change their color when the image on the screen changes and appear as a black dot. Although it should be taken into account that dead pixels can be not only black - on a black background such a dot is usually white, and there are also red, blue and green faulty pixels. In our time, such a malfunction can be corrected in a specialized workshop. To do this, it is necessary to replace the corresponding failed transistor, and it will again be able to perform its functions.

But it happens that dead pixels on the monitor are formed not due to the failure of the transistor, but due to the so-called stuck dots. Typically, a jam is accompanied by the appearance of a light dot on a dark background, which does not change its color under any circumstances. Such a defect, unlike a “black spot,” can be tried to be corrected at home using some physical or software manipulations.

It should also be noted that the world's leading manufacturers are currently establishing special standards that allow a certain number of faulty pixels in various standards. This is due, first of all, to the fact that the percentage of defects among matrices operating on liquid crystals is quite high. You should pay attention to this nuance if you are going to contact a repair shop under warranty. A table of acceptable defective pixels is included in the standard called "ISO-13406". It can be easily found on the Internet on the websites of many leading manufacturers of LCD monitors.

Many users often have a question: how difficult is it to see dead pixels with the naked eye? It is unlikely that it will be possible to answer this unambiguously. This is due to the fact that when buying a monitor, sellers very often show us bright, changing images, thereby not allowing us to properly examine the display in different situations. For example, it happens that a defective red dot can only be seen on a green background, and even then a certain shade. Therefore, you should check your purchase very carefully. This can also be done using special programs. One of the best such utilities is “Nokia Monitor Test”, which allows you to test your monitor for various defects, readability, moire and damaged pixels.

Don’t forget that you can try to “cure” the so-called stuck dead pixels (not black dots, but colored dots) at home. To do this, you can use special programs (one of the best such utilities is called “ScreenFix Deluxe”) or try to massage the defective area of ​​the display with a cotton swab. The main thing is not to overdo it during such a “massage”, since the chance of further damaging the display or its anti-glare coating is quite high.

How to get rid of dead pixels? It is necessary to check for defects, including dead pixels, before purchasing. Later, most likely, it will not be possible to replace or return the monitor, citing the presence of non-working pixels.

Sellers argue this based on manufacturer standards regarding dead pixels. And the permissible number of such pixels is unlikely to please you. So check it right away.

Some damaged pixels are easily visible, while others are more difficult to notice. It is better to use the special Nokia Monitor Test utility to check.

Testing for dead pixels

It's very easy to use. Run the test so that all colors are displayed and look carefully at the monitor. If there are any damaged ones, they will be clearly visible.

There are three types of damaged pixels:

1) dark pixels that stand out against a white background. There is no way to fix it;

2) pixels that glow white on a dark background;

3) colored pixels that do not change color (usually red).

If the pixel is not displayed on the screen, that is, it is black on a white background, then you will have to accept it. He is burned out physically, so it will not be possible to “unblock” him. If there are dead pixels of the second and third types on the monitor, then the situation can still be corrected. The problem is that one of the subpixels is “stuck” on one color and now does not respond to attempts to switch it.

Sometimes dead pixels can only appear over time. Such situations also happen. Moreover, when there are only one or two of them, not every service center will want to take on the correction. Especially if the warranty period has expired. That is, you will have to act independently. The problem can be resolved by two methods: software and mechanical.

Treatment of dead pixels on the monitor

In the first case, it is convenient to use the specialized program Bad Crystal. This is a free utility and very easy to use. The principle of its operation is that colors change in a selected area with a high frequency. Thanks to this, the monitor pixels work in enhanced mode.

As a rule, 10 minutes of program operation is enough to “unlock” a pixel. But sometimes it takes up to several hours. Note that the utility will not harm the display, since the working pixels are designed for such intensive work.

In some cases, the software option does not help and you have to mechanically act on the dead pixel. The essence of the method is to lightly massage the area of ​​the dead pixel. The main thing is not to overdo it. This cannot be done with a finger or any hard object.

Take a cotton swab and move it in light circular motions in the area of ​​the dead pixel. Remember that the monitor must be completely turned off. If you did everything correctly, then the chances of fixing problems with the pixel are high. We recommend that after all manipulations with the monitor, you check it again using the Nokia Monitor Test utility.

schel4koff.ru

Dead pixels: what is it, how to check the screen for dead pixels and how to fix the defect?

› Home › Horizon › Gadgets › Dead pixels: what is it, how to check the screen for dead pixels and how to fix the defect?

Nowadays, technology is progressing at incredible speed. Old televisions with cathode ray tubes have been replaced by televisions with liquid crystal screens. The design and dimensions of these TVs are changing. The contrast and resolution of screens are increasing. At first they were only flat, but now concave ones have appeared, apparently the next step will be spherical television rooms. But, unfortunately, any technological development is not without its drawbacks.

And technology based on the use of liquid crystals is also no exception. It’s extremely unpleasant when, while watching, you notice a dot on the screen that at first you take for dirt, you try to erase it, wash it off, but it doesn’t disappear, and then it dawns on you that this is not dirt at all, but a screen defect. One or more pixels do not work and do not change color when changing the picture. Such dots are called dead pixels.

How can you notice such pixels when choosing a TV with an LCD screen and how many of them are allowed? Let's try to figure this out now.

Pixel performance

The matrix of a liquid crystal screen consists of tiny luminous dots, which are called pixels. The pixel itself consists of subpixels, each of which glows in its own color, one of the three primary colors: red, green or blue.

Due to the fact that each pixel can glow in a different color, add to this the change in the direction of the light beam of different powers... all this together ensures that each individual pixel acquires its own shade. And the glow of all the pixels together contributes to the formation of a complete image on the screen, which we see on the screen of a TV, smartphone, computer monitor or tablet.

Types of Pixel Faults

In modern liquid crystal matrices, each individual pixel is controlled by a thin-film transistor. When such a transistor fails, we see dark dots against a light background, which we can at first mistake for dirt.

But in fact, this is not dirt at all, but an extinct pixel, which is also called a “dead” pixel. Or a white dot is a burning pixel. And if one of the subpixels fails, the dot acquires a permanent color color (red, blue, yellow or green). Such a pixel is called stuck.

Dead pixel rate

Since the production technology of liquid crystal matrices is quite complex, detection of defects is only possible on the assembled screen. Naturally, there is a certain percentage of rejection. But to reduce this percentage, manufacturers have introduced standards that regulate the permissible number of dead pixels.

For example, for matrices from Sony, Sharp, Toshiba and some other brands, 0.3% of dead pixels is acceptable. And such equipment is considered to be in working order, therefore it is not subject to exchange or return. Liquid crystal monitors are divided into classes based on the permissibility of the number of faulty pixels. There are only four of them. First class monitors, in principle, should not have dead pixels.

For the second class, no more than two white, two black and five colored defective pixels are allowed. For third-class screens, no more than five white, fifteen black and fifty color dead pixels are allowed. And for fourth-class monitors, which, fortunately, almost never appear on our market, no more than fifty white, one hundred fifty black and five hundred color defective pixels are allowed.

Checking for dead pixels

In a store, any salesperson will be happy to show you all the capabilities of an LCD screen. Color pictures will replace one another at high speed. The brightness and contrast of the image will be at the highest level. And at the same time, dead pixels are almost impossible to see.

But if you display a single-color background, for example, black, on the monitor screen, you will immediately notice white and colored faulty pixels. Black, white, red and blue damaged pixels are clearly visible against a green color background.

Program for checking dead pixels

Now there are many special programs that are designed to test LCD screens for defective pixels. The most popular, perhaps, is the Nokia Monitor Test, with which you can test the device for a variety of visual parameters, including dead pixels.

In a store, you can ask the seller to test the monitor you want to buy, and he cannot refuse you. At least, I was never refused, except for the case when the TV was delivered to my home. Usually sellers have the necessary program, but just in case, you can take it with you to the store on a flash drive.

The test for dead pixels is very simple, even primitive. The program changes the screen colors at your command, and you look at the screen and look for dead pixels, which become clearly visible.

Repairing dead pixels

It makes sense to restore dead pixels if you noticed them too late to cancel the purchase or exchange the product. And also in the event that this defect really interferes with the use of the device. The fact is that there are not very many chances to get rid of the defect, but there is an opportunity to add problems.

First, you can try to restore the functionality of the pixels using software. For this you can use: Bad Crystal and/or UDPixel.

If it doesn’t help, try “massaging” the faulty pixel by lightly pressing on it with a cotton swab. When massaging, remember that in this way you can not only not fix anything, but also create new faulty pixels.

If all the actions taken do not lead to a correction of the situation, then you will have to come to terms with the defect and try to forget about it. If dead pixels make using the device unacceptable, you will have to buy a new one.

Right now (as I type this text) I have in front of my eyes a Samsung monitor that is already 8 years old. When I bought it there was not a single dead pixel, I checked it in the store. At the moment, several faded pixels have appeared, which become noticeable when working in Photoshop and if you look closely, but in other modes of using the monitor they are completely invisible, so it didn’t even occur to me to waste my time on them :).

Related articles:

Waterproof speakers, which were the best in the test? What parameters and which tablet to choose for a child?

Comments (3)

2016-02-08 21:14:11

I never thought about dead pixels because I never encountered such a problem. But, in the store, when I bought a computer, they naturally checked it in operation first.

2016-02-15 22:11:36

Oh, how interesting, I didn’t know that there are special programs for checking for dead pixels, and even more so that you can try to eliminate them. I know that they tend to grow, that is, next to the broken ones, other pixels burn out faster.

2016-04-01 23:14:41

I work in an organization that practices selling used monitors to company employees at a low price. Now I can check for dead pixels myself - I made a black screen and everything is immediately clear!

CompoGid.ru

How to repair dead pixels at home?

Monitors have become an integral part of our lives. Society observes their presence every day on various devices and gadgets: mobile phone, computer monitor, laptop screen, etc. Despite the abundance of models, all screens differ in two parameters: manufacturing technology and pixel density. The quality of the picture depends on them. But regardless of progress and the latest technologies, a person is not immune from various breakdowns, one of which is a dead monitor pixel.

How can you tell if a pixel is faulty?

A dead pixel is a part of the monitor (point) that does not match the color gamut of the displayed picture. As a rule, this is a dark pixel that is clearly visible against a light background. This type of malfunction does not require repair and, if the equipment is under warranty, it can be replaced.

But the most unpleasant damage is brightly glowing dots of different colors: red, white, green, etc. Often such spots appear suddenly and disappear imperceptibly. Popularly this problem is called “stuck” pixels. Unlike the first option, this problem can be treated in two ways: programmatically or mechanically. To work, you do not need any special devices or laboratory conditions. All steps can be performed at home.

How to find dead pixels on the screen?

First you need to check what condition the monitor is in. Sometimes the indicators can surprise owners, forcing them to abandon the idea of ​​​​restoring dead pixels. You can often find “dead” pixels on the screen. Yes, we can say that such breakdowns can be corrected under warranty, but the law contains a clause that indicates the permissible number of dead pixels on monitors. Therefore, you have to correct the deficiency yourself.

There are a huge number of tools to check this. They can be executed as a separate program with a set of functions, or as an online service that can be used via the Internet.

A good example is the free service Onlinemonitortest. It invites its visitors to select monitor tests from the list:

• checking for dead pixels;
• checking the backlight;
• color rendering;
• text readability test and much more.

This service is a useful resource not only for identifying faulty pixels, but also for adjusting various parameters on the monitor.

Among the useful programs, we note the TFT test. This program has an intuitive interface and does not require installation on your computer. It will be enough to simply download it. A large number of tests included in the program can identify all screen defects and configure it for comfortable operation.

Recovery methods

After you have been able to check and evaluate the condition of the monitor, you can determine the restoration method, which can be of two types: mechanical and software.

Software method

The result is achieved by quickly changing the colors of neighboring pixels. As a result, more energy falls on the “stuck” pixel, and it is restored. This method is able to cure the problem in 80% of cases. This may require more time, experimentation with the duration of the program and the set of colors.

Sometimes, restoring dead pixels in this way brings only temporary results, and after some time, multi-colored dots may appear on the monitor again. If this happens, the procedure should be repeated. Some pixels cannot be permanently cured.

Mechanical method

If treatment with the software method fails, you should use the mechanical method. The process of such restoration looks like a normal wiping of the monitor. You can use a cotton swab and rub it with sufficient force on the part of the monitor where the dead pixel is located. The pressure should be such that streaks appear on the screen. This process may take up to 30 minutes.

The same procedure can be repeated with the monitor turned off. Another way is to lightly click your fingernail on the area where the dead pixel appears.

If the mechanical method does not help, you can combine it with the software one. To do this, you need to run the program on your computer and simultaneously “massage” the dead pixel for about 15 minutes, then leave the program running for a long period of 5–10 hours.

Description of programs that restore pixels

It is worth saying in more detail about the programs that are used in the software method. The most popular programs that repair dead pixels are Bad Crystal, JScreenFixDead and DeadPixelTester.

BadCrystal

This program is used most often. It is widely available on the Internet and can be downloaded or purchased. The free version only works for 30 days and has restrictions on a number of services. You can find a previously released version of BadCrystal 2.6. It is also free and works without limitations, but lasts only one minute. In order to eliminate this nuance, you can use a kind of “crack”: hold down the left mouse button and move the program window, without releasing the button, press it down with some object (book, glass, keyboard). In this situation, the program will run indefinitely.

To start working with the software, you need to decide on which device the dead pixels will be repaired: a monitor, a mobile phone screen, a game console or a plasma panel.

To repair mobile phones and game consoles, a video file is used, which must be pre-generated, then it is played on the equipment in multiple repetition mode.

For a plasma panel, the same video can be recorded to disk or you can use the FullScreen mode and run the program on your computer.

So what should you do? Open the additional program menu by moving the mouse to the top of the window. This displays the four modes that are available: Common Clearing (CCM), System Modified (SMF), Complex Force (CFV), Personal Protection (PPM). If you use the free version, you can only use CCM and PPM. SMF and CFV modes provide a higher percentage of pixel restoration.

The default mode is CCM. Launch it by clicking Launch. Move the program window to the area where the luminous dots appear, let the program run for 5–10 minutes, after which you need to check the result. If no changes occur, repeat the procedure with increased speed, for which you need to use the active SpeedUp button. Leave the program to run for 10–15 minutes.

Therefore, you can repeat attempts, using an increase in speed to the maximum. You can also experiment with the duration of the program. So, in the most difficult cases, repairs can take up to 10 hours.

To avoid recurrence of such problems with pixels, it is recommended to run the automatic prevention mode. In PPM mode, the colors on the monitor change. This procedure should be repeated several times a month to completely remove all problem areas.

JScreenFix

This is a Java application that can be used without installation on your computer. You cannot download it for free; only a paid version is available on the Internet.

Getting started with the program involves finding an area that needs repairs. To do this, select the Locale button in the menu and the program window turns black, move the window in search of luminous points. There is also a FullScreen mode that allows you to check the entire monitor. It's available for free.

Next, you can move on to a paid service - this is the repair of dead pixels. The principle of operation here is the same as in BadCrystal. Also on the site you can download ready-made video files demonstrating the algorithm of the program. This feature is provided free of charge. Such tracks can be played using a player convenient for you on any device, but the effect of this treatment will be less due to the difference in picture resolution.

DeadPixelTester

This is an application that allows you to find and repair dead pixels. The program can be downloaded on the Internet. To start working with the service, select the Solid option in the Pattern menu. Here you need to check the box next to Autocolourcycle and set the time interval to 2500 milliseconds. Then we leave the program running for several hours. This program allows you to remove false pixels on your laptop or computer monitor. It is NOT always possible to cure all stains; they either remain or may reappear some time after they disappear.

Repairing this problem, like dead pixels, can be done at home, without resorting to complex technologies and specific methods. Which of the proposed methods to choose is your decision.

InstComputer.ru

Dead pixels on laptop

Dead pixels on a laptop are non-working, glowing dots or parts thereof. A dead pixel is black and can be seen in light or white colors. It cannot be cured. A dot that glows red, purple, yellow, blue or green is a dead pixel or sub-pixel on the monitor.

How are dead pixels removed?

Many people ask the question: how to remove a dead pixel? You can remove dead pixels at home in two ways:

• program,
• mechanical.

Software recovery

The software method involves quickly changing the colors of neighboring pixels. Thus, the subpixels receive a large amount of energy and come back to life. Using this process, you can restore 55%-80% of broken points. It may take varying amounts of time to restore points. During setup, you will need to change the speed of color replacement and the working time of the program.

In hot weather, the corrected pixel may stop working again. It is necessary to repeat the entire recovery process again. There are cases when such a dead pixel on a laptop cannot be cured.

Updating dead pixels with the program

The Bad Crystal program can not only be purchased, but also downloaded. You can use the program in test mode for free for 30 days, but some functions will not work. The previously developed version of Bad Crystal 2.6 has no restrictions in operation, but the open program runs for 1 minute. To increase the operating time, you need to move the window with the left mouse button and do not release it. The button can be pressed down with any object and left in this position for the required amount of time. Before starting the program, you must select a device: computer screen, plasma panel, console or telephone.

How to remove dead pixels mechanically

To restore dead pixels mechanically, we will need a cotton swab and a lot of patience. It is necessary to massage with a cotton swab on the monitor where the dead pixel is located. You don’t need to apply too much pressure with the stick until streaks appear while doing the massage. This procedure must be performed for 10-30 minutes. After restoring the pixels mechanically, you can also run the Bad Crystal program.

If this method does not give any result, then you can combine it with the software one. You need to start the program and at the same moment massage with a cotton swab for about 15 minutes, and then leave the program in operating mode for another 10 hours. If this method does not get rid of dead pixels, then you should replace the matrix for the n116bge laptop. In this article, we talked about subpixels and dead pixels. We also talked about how to remove dead pixels. Let the article bring you only benefit.

1comp.spb.ru

Checking and treating dead pixels. Part two

Here is the promised continuation of the material on the treatment of dead pixels on LCD monitors.

What are “dead pixels”, what are they, how are they diagnosed and how are they treated, and why, in fact, you can’t just exchange a defective monitor under warranty - we talked about all this in the first part of our article. Those who have just joined us can get acquainted with it here.

Well, for now we will continue to get acquainted with other treatment methods.

Having sifted through mountains of information on the World Wide Web, we came to the conclusion that all methods available at home for treating dead pixels on LCD monitors can ultimately be divided into two main methods: software - the method of aligning pixels using high-speed color changes in the defective area, and mechanical - a method of direct physical impact on a stuck pixel. But there are several ways to implement them, some of which you met in our first article. Now it's time to explore other options.

Software methods for treating dead pixels

You were introduced to the ScreenFix Deluxe utility in our first article. We can only add that the 20 free minutes of work declared by the manufacturer is often not enough for complete treatment, and you need to buy a license. But there is another option. On the page http://www.jscreenfix.com/video.php the developer ScreenFix Deluxe has posted ready-made video files for free downloading with a recording of the therapeutic effect of the program. Files are available in various formats and for various monitor resolutions. There are even files for mobile phones and PDAs. Also on this page there are disk images that can be burned onto a blank disc and played on a home DVD player - you can try to cure, for example, an LCD TV.

Another program of this kind, UDPixel, is completely free. You can download it from our website. The utility is very easy to use. On the left side of its working window there are buttons that allow you to fill the monitor screen with some uniform color - this will help to accurately determine the location of defective pixels. On the right side are the main settings. You can select the number of dead pixels that you want to treat simultaneously, the size of the treatment areas - 1x1 or 5x5 pixels, and the flicker frequency - the developers recommend setting it equal to the response time of your monitor. If you don’t know him or are not sure of the accuracy of the information, leave everything as is. After launch, a small flickering area appears on the screen, which you need to drag with the mouse directly onto the dead pixel. When you right-click on it, you can select the colors with which it will flicker.

The program also has a small drawback - the developers say that to get the desired effect, the utility will have to be run for several hours. But there is a big plus, in addition to being free - UDPixel can work in the background and does not interfere with other programs at all. Those. During treatment you will be able to fully use your computer. (If you accidentally minimize the main program window, UDPixel will completely disappear from the panel - the healing areas will remain - in this case, you can close the program only through the Task Manager, killing the UDPixel process)

Another similar program is Bad Crystal. Its brief description and download link are also available on our website.

Mechanical methods for treating dead pixels

To the options for massaging defective areas described in the first part of the article, you can add the use of pressure from the back of a regular pencil with an eraser at the end.

Sometimes a fingertip massage helps. You need to place your finger on the dead pixel, press lightly and move it 3-5 mm. You can move it both horizontally and vertically, or try drilling movements. The degree of pressure can be controlled by whitish streaks radiating from the massaged area.

Several ways to treat dead pixels from foreign users

1.Cover the screen with a clean rag or paper napkin folded in half to prevent scratching the monitor. Take some object with a thin but not sharp end - a stylus from a PDA is ideal. Place the tip of the stylus exactly on the dead pixel - try to place it as accurately as possible, without affecting healthy areas. Without removing your hand, turn off the monitor. Press lightly with the stylus and, without interrupting the pressure, turn on the monitor again. Stop pressing, the dead pixel should disappear. If necessary, the operation can be repeated several times, changing the pressing force and the accuracy of the stylus positioning.

2.Turn on the monitor and put on some dark image to see the dead pixel more accurately. Take a pen with a rounded end or something similar. Place the rounded tip exactly on the defective area and press lightly so that a small whitish area forms around the pressure point. Let go. Can be repeated 5-10 times, gradually increasing the pressure.

3. Extreme method - high temperature method. Useful in cases where there are quite a lot of defective areas. Works best with laptops, but can also be used on standalone monitors.

ATTENTION. This method is dangerous, as it can lead to overheating of the computer and its complete failure, or burnout of its individual components.

You use it at your own risk. The editors do not bear any responsibility for possible consequences. Be sure to back up all important data before using it.

Turn on your computer. If it is a laptop, provide it with power from the mains. Go to Control Panel and disable all sleep and standby modes - the monitor should be on all the time. Close the laptop lid, but do not let it close all the way - place something small and soft between it and the case. Place your laptop or monitor in a partially closed desk drawer or some other less well-ventilated area and leave it there for several hours or even days, checking the results occasionally. The high temperature will allow the liquid in the crystals to flow more easily and get into areas that were not previously filled.

There is one more trick. You need to disconnect absolutely all cables connecting it to the computer and the network from the monitor and wait a couple of days or, with the cables disconnected, press the power button several times - all capacitors in the monitor should be completely discharged. After this, perhaps the stuck pixel will begin to function normally again. Try it, sometimes it helps.

And finally, another extreme way to treat dead pixels.

The method is quite dangerous. Everything is at your own peril and risk!!! If you are not sure, use the methods above.

We determine the exact location of the dead pixel. We add a contrasting background underneath it so that the defect is clearly visible - for example, black if the pixel is white or colored, or white if the defect is dark. Take a disc box/SD flash drive or something similar (it must be plastic, not very soft, but not hard either, as you can scratch the screen). Without turning off the monitor, we begin to massage the broken pixel with the prepared object. The movements should resemble the movements of rolling out dough - you seem to push the “dough” from neighboring pixels (within a radius of 2-3 pixels) to the central one, which is not working, then back from the idle one to the neighboring ones (no need to do circular movements, you can scratch the screen ). You don’t need to press too hard, but you don’t need to press too lightly either. You need to press so that the marks in the massage area are visible.

If after 30 seconds of hard work the broken pixel has not been restored, you can stop - there will be no point, you shouldn’t keep pushing for several hours. With all this, you need to be extremely careful not to damage neighboring pixels. If you have no idea about the structure of the crystal lattice of an LCD matrix, then it is better not to try to use this method.

We can finish here. We hope that one of the methods we described will help you restore dead pixels on your LCD monitor.

Happy treatment!

Question from a user

Hello.

A white dot appeared on my monitor in the center, and another red one in the corner. The one in the corner - I don’t care about it, but in the center - sometimes it’s annoying and gets in the way. When a color picture is shown it is not so noticeable, but when it is monochromatic (and especially dark) it does not look very good.

They refused to repair my monitor; they said that these dead pixels cannot be restored (it’s easier to buy a new monitor). Is this true, and is it possible to somehow remove these dots and restore dead pixels?

Michael.

Good day!

In fact, one of the most common problems with monitors is the appearance of dots on the screen that do not change their color (i.e. do not work). Most often, they glow simply with a single-color light: white, dark, red, etc. Such pixels on the monitor are called broken .

In this article I will try to answer both your question and similar ones regarding this topic. I will show you how to check your monitor for the presence of these dead pixels, and also give several recommendations that can bring such pixels back to life. So...

To help!

Checking the monitor: doing a test for dead pixels

A few important points

If you think that dead pixels can only appear on old monitors, then you are deeply mistaken... It’s even more offensive when you buy a new large monitor, and then in the process of work you find that one pixel in the center does not “light up” (more precisely, it lights up red) . And what’s even more offensive is that you most likely won’t be able to return such a monitor under warranty!

Important!

According to the standard, monitors are divided into various classes (I, II, etc.). Each class is allowed a certain number of dead pixels, and until this number is exceeded, this is not a warranty case!

Therefore, be very careful when buying a new monitor, I recommend that you test it right in the store!

One of the tables with the allowed number of dead pixels is shown below. In general, class IV is essentially a defect (and they are not for sale on the mass market); most often, an ordinary home monitor is a class II or III device. Therefore, to pass under warranty, you need at least 2-3 dead pixels. This is all to say that checking when purchasing is very important!

How many dead pixels are allowed on the monitor (depending on its class). Important: this plate is just an example; non-conformity standards change frequently.

And so, now about how to check...

The essence of the test: you need to fill the screen with different colors one by one: white, red, green, black, etc. With each fill, be sure to carefully examine the entire surface to see if there is any point that stands out from the rest. See 2 photos below, they show very well what to look for.

It is best to “fill” the monitor with multi-colored paints using special utilities. One of the most convenient is IsMyLcdOK (more about it below).

Using the program IsMyLcdOK

One of the best utilities for checking your monitor for dead pixels!

The utility is very simple and does not require installation or configuration. It weighs only 36 KB and can be recorded on any media. After launching, you just need to press the numbers on the keyboard: 1, 2, 3, etc., or the Ctrl key - and the entire screen will alternately be filled with different colors. All you have to do is watch what is happening carefully.

Thus, using IsMyLcdOK, you can assess the condition of the monitor in a few minutes. I definitely recommend using it!

The main advantages of the utility:

1. small size - only 36 KB, can be written to any flash drive;
2. you don’t need to install or configure anything - just run and press one Ctrl button;
3. The utility is free and works on all versions of Windows.

Online method

Monitor Test

A very simple and effective utility that can revive (restore) dead pixels. The utility is free, works in all versions of Windows, and takes up very little space. In addition, when it works, you can do your own thing at the same time. That's why I fixed my gaze on her ☺.

How to work in it (step by step):

Method number 2: discharge...

This method can in some cases help restore the pixel's functionality. Its essence is to disconnect the monitor from any power sources and let it stand for several days (4-5 days are recommended!).

If you have a laptop: disconnect from the mains, remove the battery, disconnect all wires going to the device (network cable, mice, speakers, etc.). That's it, leave the device in this state for several days.

If you have a regular PC monitor: Also unplug it from the network and from the computer.

If you leave the device in this state for these 4-5 days, then all the capacitors in the device will be discharged, and the residual voltage will leave the thin-film transistors. And when you connect the monitor to power and turn it on, the stuck pixel will be shaken, perhaps it will return to “life” (I’ll note right away that this method does not always help, in about 5-15% of cases).

Method No. 3: mechanical pressure

If the software method does not help, try using a cotton swab (or a pencil with an eraser at the end). Then place this stick or pencil approximately in the center of the broken pixel and press lightly (if streaks appear on the screen, remove the object).

If the pixel does not start working, repeat the operation (you can slightly increase the force). So try 20-50 iterations.

Also, try turning off the monitor completely, then pressing on the place where there is a dead pixel, and then turning on the monitor. In some cases, the "stuck" pixel wakes up and starts working as expected...

That's all for me, I would be very grateful for any additions on the topic.

How to remove dead pixels on a computer, phone or TV monitor.

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First of all, let’s explain what pixels are and what the word “dead” pixels means. The screens of our modern gadgets consist of pixels, very small squares. You can find out how many pixels there are on your computer monitor screen by right-clicking on it and selecting:

1. Options;
2. Additional screen options;
3. Permission.

The set resolution just shows how many dots - pixels - are currently on your screen. Moreover, you can independently change the number of pixels on the screen, increasing or decreasing the screen resolution. However, if you set it to a value other than the recommended value, disproportionality and distortion may occur when projecting images.

Pixels also have their own components - subpixels, in the amount of three colors, namely blue, red and green.

The main color of a pixel consists of the location of individual subpixels, as well as the direction of the light beam, which varies in power.

What do “dead pixels” look like?

The concept of "dead pixels" is too broad, and covers all sorts of pixel problems, from freezing to dying. I will try to describe in detail specific problems with pixels.

Take a close look at what your “Dead Pixel” looks like on the screen. If it is a small, colored dot, for example red or green, other colors are possible, then this means that the pixel is “stuck”, or, as they say, frozen, and it is quite possible to move it.

But if this is a black or white dot, then this indicates that the pixel is completely covered and it will be difficult, and most likely completely impossible, to revive it. Although, you can try.

A modern monitor uses an active matrix, where all pixels are independently controlled by thin film transistors (TFT, Thin Film Transistor). When they break, a black or white inactive spot appears on the screen - a dead pixel.

It does not change colors when changing pictures, because the personal transistor does not react to this change. Such “dead” pixels can only be restored by replacing the corresponding transistors, which is done in service centers and workshops; ordinary users cannot fix the defect on their own.

How to remove dead pixels on computer and mobile device monitors

There are quite a lot of online services and stand-alone programs on the Internet that can revive a frozen pixel in the case where a thin-film transistor is simply frozen a little.

You can check your monitor online for dead pixels on the website monteon.ru or on the website tft.vanity.dk
Checking the monitor with free and lightweight utilities IsMyLcdOk, Dead Pixel Tester or programs - UDPixel or AIDA64.

Fixing dead pixels online can be done at the JScreenFix-Fix stuck pixels service at www.jscreenfix.com. We go to the service and press the bright yellow button at the bottom of the screen, most often on the right.
After that, scroll down the screen and press the blue button - Launch JScreenFix. A window will open with chaotically changing pixel colors. Set the window to the dead pixel and leave it for one or two hours. Such treatment is successful in 50% of cases.

Removing dead pixels using mechanical force

If it was not possible to “wake up” a frozen pixel on the monitor using the program, then you can apply mechanical force to it, for example, tapping this place or placing a click.

You can take a soft eraser and rub the area, that is, “massage” the problem area. However, do this without fanaticism, do not break the monitor, count on your strength. A slight mechanical impact may well start the operation of the TFT.

Helpful information:

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This article will tell you how you can fix a stuck pixel on your LCD monitor that has stopped changing colors. The pixel usually gets stuck on some color other than black or white, and the problem can often be fixed in a couple of different ways. If the pixel turns out to be broken and not stuck, then it will be impossible to fix it. Likewise, although you have a chance to fix a stuck pixel, it cannot be guaranteed that you will successfully fix it.

Steps

Part 1

Preparing for work

Make sure that the pixel is really just stuck and not broken. Although the terms “dead” and “stuck” pixel are often used interchangeably to refer to problematic pixels, stuck pixels can be fixed, while dead pixels cannot. If a pixel is a specific color other than black, or doesn't change color correctly depending on the background color, it's likely just stuck.

• Dead pixels usually remain white or black no matter what is happening on the screen. Even though white dead pixels are sometimes called “hot”, they are not fundamentally different from black dead pixels.
• If you find a dead pixel on your monitor, you will need to either have it repaired or have the screen replaced. Also, sometimes (but not always) dead pixels are covered by the manufacturer's warranty for replacement of the device or its screen.

1. Understand how pixels work. Pixels reflect combinations of red, blue and green colors depending on what is shown on the screen. A pixel can become stuck for a variety of reasons, including using the monitor for too long or after a long period of displaying overly saturated colors. When a pixel is stuck, it displays only one color, which may vary slightly depending on the color of the surrounding pixels.

   • Again, a dead pixel never changes color regardless of the state of surrounding pixels.

2. Check the warranty terms for your LCD monitor. Often, manufacturers are willing to replace a monitor when it has a certain number of stuck or dead pixels. If your monitor is still under warranty, it is best to take advantage of a warranty replacement rather than trying to fix the problem yourself.

   Turn off the monitor for 24 hours. If the pixel got stuck recently, then the problem may disappear by itself - just turn off the monitor for a day. There's no guarantee that you'll fix your monitor this way, but a stuck pixel often means the monitor has been in use for too long and it's best to unplug it for a while to prevent further damage.

   • Completely unplug the monitor.

3. Consider having your monitor repaired. Even if the monitor's warranty has already expired, paying for professional repairs will be cheaper than buying a new monitor due to an accidental breakdown of the device as a result of DIY repairs.

   Know that the pixel can work on its own. It is not uncommon for stuck pixels to disappear after some time, however, this period can vary from a few days to several years. If you only have one pixel stuck on an expensive monitor, it is best to refrain from tapping, rubbing, or otherwise physically pushing the monitor to fix the pixel.

   Part 2

   Using software to fix screen problems

   1. Understand how this method works. Screen repair software shows random combinations of red, green and blue at up to 60 flashes of color per second to return the pixel to its normal cycle.

      • There is no guarantee that screen repair software will successfully fix the problem, but it is usually effective in more than half of the cases.
      • There are both paid and free programs for restoring monitor screens. However, free programs are just as effective in repairing pixels that can actually be fixed.

   2. Avoid using stuck pixel repair software if you have epilepsy.

      Because such software displays random flashes of rapidly changing colors on the screen, you may want to avoid using it if you (or anyone in your family) has a history of seizures. Visit the JScreenFix website.

      Go to http://www.jscreenfix.com/ in your browser. JScreenFix is ​​a free online application that can fix stuck pixels. Scroll down the page and click on the button Launch JScreenFix to launch the application.

      This button is colored blue and is located at the bottom of the page. It allows you to open JScreenFix in your browser. The main part of the screen will be black, so you can easily find the stuck pixel.

      • If the pixel is not located in the black area of ​​the application window, press F11 to enter full screen mode. You may have to hold down the Fn key first to press F11 if the browser doesn't go into full screen mode when you just press F11.

   3. Move the flashing repair block of the application to the stuck pixel. Click and drag the flickering block onto the problematic pixel, then release.

      Leave the application running for at least 10 minutes. In this case, do not roll up the window, move the repair unit, or turn off the monitor.

      • If possible, leave the application running for a full hour.

   4. Check the pixel status. When the required amount of time has passed, close the application window to check the pixel. If the pixel is restored, then the problem is solved.

   Part 3

   Applying pressure and heat to the problem pixel

   Understand the risks associated with this method. Although some people have been able to fix stuck pixels with pressure or heat, using this method is more likely to damage your monitor screen than to fix it.

   • Another problem with this method is that it voids your warranty.

   1. Turn on your computer and LCD monitor. For this method to work, you must turn on the monitor.

      Open the black image. It is critical that the screen actually shows a black image and not be in a no-signal state, as you need the LCD monitor's internal backlight to work.

      Find a thin object with a narrow, blunt end. You can use a marker or a pen with a pointed cap, a very blunt pencil, a plastic stylus, or the back of a makeup brush.

      • Before moving forward, please read the warnings at the end of this article. Physical friction can aggravate the condition of the monitor screen.

   2. Wrap the end of the selected item with a napkin. This will protect the monitor from scratches.

      • If an object can pierce a napkin, then it is too sharp. Find something else.

   3. Use the rounded end of an object to gently press down on the stuck pixel. In this case, a white ripple effect should appear around the point of contact.

      • Try to press exactly on the stuck pixel without affecting the surrounding area.

   4. After a few seconds, remove the item. If the pixel remains in the same state, you can reapply this method or switch to using heat. However, if the problem is resolved, turn off the monitor immediately and do not turn it on for at least one hour.

      Wet a washcloth with hot water. If possible, heat the water on the stove until the first sign of gas bubbles appears at the bottom of the container (about 88°C), then dip a washcloth into it and soak it in the hot water.

      Protect your hands. To avoid burning your fingers in subsequent steps, use an oven mitt or thick cloth.

      Seal the hot washcloth in a Ziploc bag. This will protect the monitor from moisture. Make sure the bag is securely closed.

   5. Apply the washcloth bag to the stuck pixel. Light pressure through the washcloth should loosen the pixel's contents slightly, potentially aiding in its correction.

      • Never apply the packet to a pixel for more than a few seconds at a time.