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.

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 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 a similar complaint, you will most likely be denied service.

checking, monitor, dead, pixels

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.

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.

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 freeze when updating color.

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 check the display

You can visually determine the absence of defective pixels by 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.

Manual method

Another way is to physically influence the screen. Light pressure can help clear up stuck pixels and get them back into working order. The method does not work in all cases, but you can try.

instructables.com

  • Find the glowing pixel and unplug your monitor or TV.
  • Take a cotton swab or pencil eraser.
  • Gently press the display in the area of ​​the frozen pixel several times.
  • Wait a few minutes, turn on the monitor and check the result.

Keep in mind that even if the stuck pixels are gone, they may reappear. There is also a possibility that after the described manipulations new defective pixels will appear.

If there are few colored dots and they do not really interfere with work, it is better not to pay attention to them and leave everything as it is.

Visual way of checking

The simplest monitor screen for dead pixels is to display a solid background in standard colors. black, white, red, green and blue. These five options will detect “burning”, “dead” and “stuck” pixels.

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.

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.

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 quality class 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 according to the 3rd class, 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.

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 browser that supports it. 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.

Several types of problem

A defect such as a dead pixel can look different:

  • elements that always remain off are called “dead pixels” and will look like dark dots on a light background;
  • pixels that are always working are considered “hot”. they can be seen against a dark or completely black background, where they remain white;
  • Elements that do not change color are called “stuck”. they become noticeable only when the shade does not match the main image.

Important: if several pixels in one area are out of order at once, such damage is called a “group of dead pixels”. Together they fold into rectangles ranging in size from 2 x 2 to 10 x 10 elements, or even in a horizontal or vertical line.

IsMyLcdOk

Another program suitable for diagnosing computer monitor matrices is IsMyLcdOk. It can also be downloaded for free 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.

Utilities for finding dead pixels (how to check the monitor, test 100% upon purchase!)

Monitor. a very important part of any computer and the quality of the picture on it. not only the convenience of work depends, but also the vision. One of the most common problems with monitors. is the presence of dead pixels.

Dead pixel. it is a dot on the screen that does not change its color when the picture changes. That is, it both burns in white (black, red, etc.) without transmitting color, and burns. If there are many such points and they are in conspicuous places, it becomes impossible to work!

In this article, I want to talk about several programs that allow you to test the monitor for the presence of dead pixels (well, to fence you off from buying a low-quality monitor).

IsMyLcdOK (best dead pixel search utility)

In my humble opinion. it is one of the best utilities for finding dead pixels. After launching the utility, it will fill the screen with different colors (as you press numbers on the keyboard). You just need to look closely at the screen. As a rule, if there are dead pixels on the monitor. you will notice them immediately after 2-3 “fills”. In general, I recommend using!

  • To start the test: just start the program and press the numbers on the keyboard in turn: 1, 2, 3. 9 (and that’s it!);
  • Works in all versions of Windows (XP, Vista, 7, 8, 10);
  • The program weighs only 30 KB and does not need installation, which means it can fit on any USB flash drive and run on any Windows computer;
  • Despite the fact that 3-4 fillings are enough for checking, there are much more of them in the program.

Dead Pixel Tester (translated: tester of dead pixels)

Another very interesting utility that finds dead pixels quickly and easily. The program also does not need to be installed, just download and run it. Supports all popular versions of Windows (including 10-ku).

To start the test. just run me the color modes, change images, choose fill options (in general, everything is done in a small control window, you can also close it if it gets in the way). I like the auto mode better (just press the “A” key). and the program will independently change colors on the screen with a small interval. Thus, literally in a minute, you will decide whether to buy a monitor.

In addition to programs that have already become a kind of standard when checking a monitor, there are online services for finding and detecting dead pixels. They work on a similar principle, with the only difference that you (for verification) will need the Internet to enter this site.

As for the test itself, everything is standard here: we change the colors and look at the screen. There are a lot of options for checking, so with a careful approach. not a single pixel escapes!

By the way, the same site also offers a program for downloading and running directly in Windows.

Monitor Test Sites

One of the representatives of this niche is the site monteon.ru. It provides an opportunity to test the screen of not only a computer monitor, but also a mobile device.

The main advantage of the site is that there is no need to download the program to your computer, you need:

  • Follow the link https://monteon.ru;
  • Click “Start”;
  • As soon as the program starts, you will see 7 color bars. Also, with the help of a kind of slideshow, at the bottom of the page, you can change colors (small dots) or press the arrows to the side;
  • You can also select gradient, shimmer, sharpness, etc. using the drop-down menu. All pictures are aimed at detecting dead pixels and also at determining the color quality of the monitor. All shades of colors must be clearly visible.
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The main disadvantage of this kind of sites is the inability to check the lower part of the monitor, which is highlighted under the menu.

Another niche representative is the well-known site https://tft.vanity.dk. He also absorbed a wide range of possible color images, which help to identify a mismatching color or no transmission at all.

To start the test, click on the “HTML Windows” button, after which a check for monitor pixels will be performed. The active menu is at the top and it pops up, that is, it appears on hover. Here you will find a wide range of standard gradients and simple colors, it is also possible to create your own gradient.

You should also be careful, because the problem with the pixel is not always obvious, sometimes a single RGB color channel is blocked, which does not allow the pixel to change its hue.

About fixing defective pixels

There are techniques on the Internet for correcting defective pixels on LCD monitors. Honestly, I am skeptical of them. Firstly, at the manufacturing plant, most likely, they have already carried out all the measures for “resuscitation” and it is unlikely that anything can be “cured”. Secondly, I tried it personally and, at best, managed to restore the dead pixel only for a while, and the next day it turned out to be constantly burning again. And, thirdly, the correction of defective pixels is carried out at your own peril and risk. You can not only not cure, but also aggravate the situation. there will be more abnormal pixels!

There are two principal ways to correct defective pixels.

The first way is programmatic action. As an example, consider the JScreenFix utility (this is a Java Applet, you need to install a Java machine in the browser). To start, click Launch JScreenFix.

Utility for programmatically correcting defective LCD pixels (JScreenFix)

Principle of operation: dots of different colors are displayed on the screen in an endless loop. It is necessary to bring a window “flickering” with all colors in place of the defective pixel. If after 20 minutes the pixel has not recovered, then the defect cannot be corrected.

Conducted an experiment with a ViewSonic 19 “VA1916W-8 (1440×900) monitor. JScreenFix corrects a color defective pixel (type III) after 20 minutes, but not for long. After a while it reappears. A similar result is given by the mechanical method described below.

The second method consists in mechanical action on the defective pixel. The pixel massage technique can sometimes fix stuck pixels. But it is not recommended to use it, as it can further worsen the situation. If you decide or do not mind the monitor, then before that it is recommended to use the softer, programmatic method described above.

The technique of mechanical action is as follows:

  • turn off the monitor;
  • we use a damp cloth so as not to scratch the surface;
  • press through the napkin with a finger (or something suitable) on the area of ​​the defective pixel;
  • at the moment of pressing, turn on the monitor;
  • after switching on, remove the finger (stop pressing). the stuck pixel should disappear.

How to check the monitor for dead pixels

Checking an LCD monitor for defective pixels consists of carefully examining the screen for abnormal pixels. Inspection is carried out sequentially for the primary colors: black, white, red, green, blue, cyan, magenta and yellow.

Checking the LCD Monitor for Defective Pixels (LCD Monitor Test Utility, 240KB)

For testing, a self-made utility is offered or you can use another, for example, NoKia Monitor Test.

Before checking, it is recommended to wipe the dust and make sure that the “native” (optimal) resolution is selected in the screen properties.

Note. If the monitor is connected via an analogue RGB connector (D-sub), then you need to check the frequency and phase (not required for digital DVI connection). For this purpose, the background of the proposed utility on the start screen has a special “checkerboard” pattern. It should be perceived as uniformly gray, without waves or interference. To adjust the frequency and phase, it is enough to select the Auto Image Adjust command (or similar) in the monitor menu. If this does not help, then check that the refresh rate is set to 60 Hz in the screen properties and manually adjust the frequency and phase (usually there are “Clock” and “Phase” items in the monitor menu for this).

Number of defective pixels on the LCD monitor. Checking your monitor before buying

In the previous post, we talked about dead (or broken) pixels on the camera sensor. From a photographic point of view, they do not pose a particular problem and are automatically masked in a RAW converter or easily “corrected” in a graphics editor.

Defective pixels on a liquid crystal (LCD) monitor (LCD screen or display) are more inconvenient because they usually cannot be corrected. Who wants to watch a constantly burning (or not burning) dead pixel in the center of the screen? Therefore, it is advisable to check the monitor for defective pixels before purchasing.

If you want to exchange an already purchased monitor with dead pixels, then keep in mind that there is an international standard ISO 13406-2 that regulates the permissible number of defective pixels on an LCD monitor. Thus, the seller may refuse to exchange the monitor or refund you if the number of defective pixels is within the normal range.

Dead Pixel Removal Program

There is a special utility that can help with such a problem, it is called Bad Crystal. The main function is reduced to frequent color changes, which can break through a stagnant pixel and return it to operation.

There is no guarantee that this will help, the chance is 50 to 50. You can set the number of color changes by setting the pace of the program. You just need to drag the active window of the Bad Crystal program to the problem area and wait for the result, this may take time.

It is worth noting that such a high intensity can have a negative result, so always monitor the actions of the program so that new dead pixels do not appear.

If your dead pixels do not work at all, then the utility will not help you, it is applicable for hung elements. If you still have questions “Checking the monitor for dead pixels”, you can ask them in the comments

The number of permissible dead pixels depending on the class of the monitor

  • Class 1: 0 pixels per million defective.
  • Class 2: up to 2 defects of type 1 and 2 or up to 5 defects of type 3 per million.
  • Class 3: up to 5 type 1 defective pixels; up to 15. type 2; up to 50 defective subpixels per million.
  • Class 4: up to 150 ppm ppm.

As you can see, each of the classes also implies the type of defective pixels.

  • Type 1: Constantly Burning Pixels.
  • Type 2: permanently unlit pixels.
  • Type 3: Pixels with other defects, including defects in subpixels (the RGB cells that make up a pixel), i.e. constantly lit red, green or blue subpixels.
  • Type 4: multiple defective pixels in a 5 x 5 pixel square.

To find out what class your monitor belongs to, you will most likely have to contact those. support, because manufacturers rarely indicate such information on the box or in the specifications. On the other hand, most monitors for general use are often in the second class.

Broken subpixel (left) and burning pixel (right)

How to check your monitor for dead pixels before you buy

However, before sending the monitor back, you should know that dead pixels are allowed in the production of monitors. this norm is even regulated by the ISO 13406-2 standard. This standard provides 4 classes of monitors, and in each of these classes one or more dead pixels are allowed. Only the highest 1st class, which includes high-quality and expensive monitors for professional activities, does not have the right to be flawed.

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 to 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 identifies 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.

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 dots that do not respond to changes in screen color and are 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.

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. a luminous snow-white point, easily detected on a dark background, it is possible to restore.
  • 2nd. faded pix, noticeable in the shades of light Spectra. “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.

Programs

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 too.
  • 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 costs of paying for the matrix adjustment.
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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.

IsMyLcdOk

IsMyLcdOk is another application that does a good job of diagnosing dead pixels on a monitor. The program also does not require installation and can be easily downloaded from the Internet for free. The application is very lightweight and works extremely simple.

When you start IsMyLcdOk for the first time, information will appear that describes what to click to test. To return to the instructions after starting the diagnosis, you will need to press F1.

To test, select the mode with the F2-F5 buttons. Among the monitor test modes available in the IsMyLcdOk program:

  • BitBlt check MB / sec;
  • Painted rectangles;
  • Painted stripes;
  • Durability check;
  • Vertical lines;
  • Horizontal lines.

In addition to special modes, it is also possible to simply switch colors or gradients.

How to check the monitor for dead pixels

The principle of operation of all programs for checking the screen for dead pixels is identical. The entire working area of ​​the display is filled with a single color, a group of colors or a gradient, which allows you to see dead pixels, if any on the monitor. Consider the main programs and sites that can be used for such a check.

Vanity monitor test

A fairly old, but well-proven service that allows you to test the monitor. For this service to work, you need to have Adobe Flash Player on your computer, which can be considered a disadvantage. To start testing, you need to click “HTML Windows”.

The choice of the operating mode in the Vanity Monitor Test program is carried out through the drop-down menu at the top.

Monteon

Simple and functional service for testing the monitor for dead pixels.

To use the service you need:

What is a dead pixel? (NCIX Tech Tips #55)

  • Go to the website monteon.ru;
  • Then press the “Start” button to start testing;

To finish testing the monitor by the service, in the lower left corner of the screen, click on the house icon.

Please note: The Monteon service, unlike the programs discussed above, has a mode in which a looped video is shown. In this mode, you can check the refresh rate of the pixel color.

What is a pixel, what are the dead pixels

First you need to tell a little theory. A pixel is the smallest part of the display that can display a picture. Depending on the resolution of the display and its diagonal, the pixel can be larger or smaller in terms of physical dimensions.

Please note: Modern monitors can use several million pixels.

If one of the pixels or a group of pixels does not work, the image on this part of the screen will not correspond to the one transmitted to the monitor from the system unit. There are several types of dead pixels:

  • Non-working. These pixels do not represent the image, and they are always black;
  • Stuck pixels. Most often these are pixels that are stuck in blue, red, or green. They are not capable of handling RGB colors;
  • Constantly glowing pixels. These are pixels that are constantly lit in white.

Please note: Sometimes more than one pixel fails, but a group of pixels in a horizontal or vertical strip, or “squares” of pixels, for example, 5 by 5 or 10 by 10 elements, is damaged.

Dead Pixel Tester

One of the most famous free apps for checking the monitor for dead pixels. To use the Dead Pixel Tester program you need:

  • Download it from the official website of the developers;
  • Launch the application. What’s important is that it doesn’t require installation;
  • Next, in the “Pettern” column, select the desired application operation mode. This can be a screen fill with one color, gradient, different colors, patterns, and so on. Click on the “Color selector” button to select a fill color. You can hide the program settings blocks from the screen by right-clicking anywhere.

Among the capabilities of the program, it is worth noting the possibility of setting the function of changing the modes on a timer, for this you need to check the box “Auto Color Cycle” and set the time in milliseconds. After that, the modes will change automatically.

Another feature of the program is to create a limited area on the screen with constantly changing colors. To create it, you need to click on the “Exerciser” button, after which the corresponding square area will be created. It can be dragged with the left mouse button. If there is any doubt that there is a dead pixel in some part of the monitor, this tool helps to make sure of this.

Programs for checking the monitor for dead pixels

Websites for checking the monitor for dead pixels

If you do not want to download a program to test the monitor on your computer, you can use sites with similar functionality. Consider a couple of options.

Please note: Sites for checking the screen for dead pixels are convenient to use, for example, when testing tablets or smartphones.

Programs for checking pixels on the monitor

Let’s consider several applications, since they all work according to the same principle.

[note] Among all, there are such programs as: IsMyLcdOk and Dead Pixel Tester. They are very lightweight, but effective because they allow you to test an area of ​​the taskbar. [/ note]

I have a monitor that contains more than 10 dead pixels and they are all at the very bottom of the monitor. They are practically invisible against the background of the panel, but against a dark background they are striking. Thus, you can be cheated by unscrupulous sellers, it is better to use one of the programs.

The program for broken pixels on the IsMyLcdOk monitor is extremely easy to use, you need:

  • By pressing from 1 to 0 you will see color and gradient changes all over the screen. There are also additional swap icons that can be used by pressing F2 to F5. Exit to the main window through F1.

Another version of DPT, slightly more convenient and functional than the previous program. To use it you need:

  • Download DPT from https://dps.uk.com/software/dpt;
  • Run the utility and you can change colors in the “Pattern” drop-down list. It is very convenient to do this by simply scrolling the mouse. You can also do auto color change using a timer;
  • It is also possible to customize the color gamut. A distinctive feature is the presence of the “Exerciser” item, which creates a small square with a changing color. A good tool if it is difficult to determine the presence of dead pixels (it can be moved).

How to check the monitor for dead pixels?

There are many programs that can help you test your monitor for dead pixels. Their principle of operation is the same, by filling the monitor with a certain color or gradient, also with a group of colors, you can more easily see a pixel that is not working. This way, you can fill the display with a single color, making it much easier to find different pixels.

The main variety in this matter is the way the program works. there are websites that can help you diagnose, but you can also download standalone client applications.

Monitor Test Sites

One of the representatives of this niche is the site monteon.ru. It provides an opportunity to test the screen of not only a computer monitor, but also a mobile device.

The main advantage of the site is that there is no need to download the program to your computer, you need:

  • Follow the link https://monteon.ru;
  • Click “Start”;
  • As soon as the program starts, you will see 7 color bars. Also, with the help of a kind of slideshow, at the bottom of the page, you can change colors (small dots) or press the arrows to the side;
  • You can also select gradient, shimmer, sharpness, etc. using the drop-down menu. All pictures are aimed at detecting dead pixels and also at determining the color quality of the monitor. All shades of colors must be clearly visible.

The main disadvantage of this kind of sites is the inability to check the lower part of the monitor, which is highlighted under the menu.

Another niche representative is the well-known site https://tft.vanity.dk. He also absorbed a wide range of possible color images, which help to identify a mismatching color or no transmission at all.

To start the test, click on the “HTML Windows” button, after which a check for monitor pixels will be performed. The active menu is at the top and it pops up, that is, it appears on hover. Here you will find a wide range of standard gradients and simple colors, it is also possible to create your own gradient.

You should also be careful, because the problem with the pixel is not always obvious, sometimes a single RGB color channel is blocked, which does not allow the pixel to change its hue.

Checking the monitor for dead pixels

The monitor is practically the only segment of the computer with which a person interacts and sees the result of the entire system. Since a monitor is a mirror of the soul of a computer and its performance, a lot depends on the screen and its integrity.

One of the few enemies of modern monitors is the presence of dead pixels, which diminish the enjoyment of using it. A pixel is the smallest part of the display that displays a picture. New monitors include millions of pixel data. A broken pixel is one that is not able to reproduce color correctly.

There is a variety of dead pixels, depending on the type of fault:

  • Constantly burning pixels;
  • Always not working (black);
  • Pixels that are not capable of transmitting RGB colors, they seem to be stuck in one position, usually red, green or blue;
  • Defect of a group of pixels, viewed in a 5×5 square.

Depending on the severity of the problem, pixels may be completely inoperative or simply have a laggy color that does not change.

It should also be noted that there is some opportunity to fix the problem of dead pixels, but it is better not to bring it up to this, although if the malfunction appeared during operation, then at the end there will be a way to fix the problem.

Dead Pixel Removal Program

There is a special utility that can help with such a problem, it is called Bad Crystal. The main function is reduced to frequent color changes, which can break through a stagnant pixel and return it to operation.

There is no guarantee that this will help, the chance is 50 to 50. You can set the number of color changes by setting the pace of the program. You just need to drag the active window of the Bad Crystal program to the problem area and wait for the result, this may take time.

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It is worth noting that such a high intensity can have a negative result, so always monitor the actions of the program so that new dead pixels do not appear.

If your dead pixels do not work at all, then the utility will not help you, it is applicable for hung elements.

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One of the most annoying disadvantages of monitors or LCD TVs is the appearance of dead pixels. Pixel. the smallest rectangular element with which an image is transmitted to the screen.

The problem manifests itself in the form of dots, the color of which does not match the image. The reason for the violation lies in the malfunction of the matrix or its damage.

  • green,
  • red
  • and blue.

This allows the display to distinguish between millions of tones and their shades. Molecules of LCD monitors exist like any molecules in a liquid substance. they are constantly moving. But the orientation of the crystal is constant. Only the electric field changes the orientation of the pixel. The crystal plays the role of a lens that can change polarization under the influence of a light wave. The matrix of a standard monitor carries about 6 million subpixels. In 4K displays, this figure can be equal to thirty-seven million. A huge number of elements cannot work without failures.

What dead pixels look like

This kind of violation might look like this.

  • When you turn on your monitor or TV, some pixels on the screen remain dark. They are called “dead” and look like blackheads.
  • Some pixels after turning off the device remain working and continue to “burn” on a black screen.
  • Some pixels are classified as stuck. They are the hardest to spot. They become visible only when there is an obvious discrepancy between their color and the check table.

Checking for dead pixels is necessary if several defects are found on the screen in one of the areas. In some cases, the defects are so noticeable that the size of the “broken” area is 10 points in length and 10 in width. Sometimes “broken” pixels are lined up horizontally or vertically and make up noticeable stripes.

How to check the screen for dead pixels visually

Installing a standard color grid on the screen is a test of dead pixels, or rather stuck pixels. The test is a grid of squares, stripes, or a specially designed drawing. Any test contains five primary colors that allow you to find stuck pixels. Working with the checker program will help you determine if the dead pixels are dead or stuck. If the “stuck” pixels are to be restored, then the “dead” ones cannot be restored.

If the TV is checked using software, then it must be connected to the computer’s processor. Also, the test can be run using a regular flash drive. Smart TV can be connected to the Internet via Wi-Fi. There are special online services for this. But you can download test utilities to your computer. If the test is carried out independently, then tests can be recorded on a USB flash drive to check the sound of the device or built-in functions. Among the software that offers colors for checking dead pixels, stand out:

  • Dead Pixel Tester,
  • IsMyLcdOk.

The first program is one of the most beloved and demanded.

Before checking for broken points, you need to run an uninstalled application. The Pettern section allows you to select the desired mode and check the colors using the Color Selector option. Changing the test mode is done by selecting the Auto Color Cycle option. This program helps you quickly find stuck points. The Exerciser option can be used to test different areas of the screen. A dedicated dynamic area allows you to thoroughly examine any area of ​​the screen.

The second program helps to diagnose the monitor matrix. It does not require pre-installation. The program has a special training option that appears on the screen after the program is downloaded.

Testing is carried out using the F2,3,4,5 keys. The program displays:

  • painted areas,
  • rectangles,
  • vertical or horizontal sections.

All programs help to flash pixels with several standard colors.

Check for dead pixels

Warranty service

  • keep the production of screens at the same levels and produce products in the same volumes without increasing prices,
  • buyers will use equipment with a certain percentage of dead pixels (these cases are not covered by the warranty).

How to check for dead pixels online

If the download mode on your computer is limited, you will not be able to download and run the program. Then you can use the online monitor checking services. There are many sites out there to help with testing. Among them stand out:

  • Monteon,
  • Vanity monitor test.

With the first service, you can carry out seven types of checks. To start a test, you need to press the button and stop choosing one of the test types. The check is carried out using a looped video. It helps to detect stuck points and control their refresh rate on the monitor.

The second program helps to quickly detect image defects. To use it, you must have a browser that supports the Adobe Flash Player program. The program allows you to select the appropriate test modes. This resource is good because it allows you to “catch” dead pixels not only on a computer monitor or TV screen, but also on a tablet, laptop or smartphone.

When a dead pixel test is needed

ISO13406-2 standards state that each monitor may have a certain number of faulty dots upon sale.

Different manufacturers have different standards for the presence of dead pixels, depending on whether:

  • how are they located,
  • what is the resolution of the monitor
  • or what is the diagonal of the display.

For example, LG has 10 stuck and 3 dead pixels on a 20-inch screen.

Samsung’s guidelines call for 7 dead spots, while Dell has 6 stuck and 13 dead spots, depending on which display was found to be faulty.

Most typical brands of monitors or screens correspond to the second class. They also need to be checked for dead pixels. The check should reveal no more than 5 incorrectly working pixels.

The class of a product influences its price. For example, monitors from the same manufacturer, but having a different class, may differ in cost several times.

Why do broken pixels appear?

Broken pixels are most often caused by dropping the TV or accidentally hitting it. Such pixels look like a dot in one or another part of the device’s screen and can have a different color. Experts identify four types of dead pixels.

  • Dead pixels. Such dots will not light up. On a white background, they look like ordinary black dots.
  • Hot pixels. They will always be on and look like small white spots on a black background.
  • Stuck. These pixels can glow in different colors. The reason for this is that some of the subpixels can be disabled or, conversely, enabled.
  • Defective. Such pixels are a group of specks. Most often it is 5×5 pixels.

Dead Pixel Test

Be sure to check the device for such defects before buying a 4K TV.

What is a pixel

The image displayed on the TV screen is formed using special dots. They are called pixels. Such points have their own specific color, which will depend on what kind of video is transmitted to the viewer. Thanks to this, you can display absolutely any picture on the screen.

Checking the TV for dead pixels

If you need to find a point that has a certain color, then in this case the screen must be of a different color and it must be considered very carefully.

Sometimes defects can be detected immediately, and in some situations you will have to resort to other verification methods.

You can also pre-download special pictures that are used to check TVs in a certain resolution. In this case, 4K TVs are checked. Pictures are dumped to a USB flash drive and then the device is connected to the TV. Then, one by one, all the pictures are viewed and from the maximum close distance the screen is examined for various kinds of defects.

A rather unpleasant situation can be called when the subpixel stops working. In this case, the cell will be painted in a certain color and attract too much attention while watching movies or broadcasts.

Download test videos and demo video

Today it will not be difficult to find test videos or demo videos on special sites that are used to check 4K TVs for dead pixels. It is enough to have a USB flash drive at your disposal, on which you can download them for further use.

Allowable number of dead pixels

There is a valid number of pixels, which is called an abnormality. In the case of devices that do not exceed 32 inches, there are five defective points. If the TV is large enough, the number of defects may exceed ten. Factories warn that dead pixels may be present, but during the check it is worth making sure that there are not too many of them.

How to recover dead pixels on a TV

There are several fairly effective ways to eliminate dead pixels on a 4K TV. Consider the most popular among them.

The first method involves physical impact on defective points. To do this, turn off the TV, take the simplest cotton swab and press it as gently as possible on the damaged area. After a couple of minutes of such manipulations, it is worth turning on the device and checking if the problem has been solved. If it was not possible to achieve the result, then you need to repeat the procedure again. It should be remembered that the TV has a very fragile screen, so all actions should be performed with the utmost care.

The second method is not so dangerous. To repair the device, you will need to use special applications. JScreenFix is ​​a fairly popular program today. It is made available to users in the public domain. The developers of the application say that only half an hour is enough for the utility to cope with defects on the 4K TV screen. In this case, the program will change colors in the faulty pixel until it selects the desired option. You can also find other applications if this option does not help solve the problem.

Checking 4K TV for dead pixels using videos

Everything in the world is developing and television is no exception. Today, you will not surprise anyone with digital TV and new options for the quality of the provided videos. In recent years, the 4K format has gradually become popular, but sometimes you may encounter situations where devices may have problems displaying video in this format. It is very important to check your 4K TVs for damage at the time of purchase. How to do this, we will talk further in the article.