Checking and repairing dead pixels. Checking the monitor for dead pixels (white, red, blue dots on the screen). How to repair dead pixels White dead pixel

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

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

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

Here is the set resolution, just, and shows how many dots - pixels, is in this moment, on your screen. Moreover, you can independently change the number of pixels on the screen by increasing or decreasing the screen resolution. However, if you set it to a value that is not recommended, then disproportion and distortion may appear 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 is made up of the location of individual subpixels, and also from the direction of the light beam, which is different in power.

What do dead pixels look like?

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

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

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

In a modern monitor, an active matrix is ​​used, where all the pixels are under the autonomous control of thin-film transistors (TFT, Thin Film Transistor). When they break, a black or white inactive speck 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, workshops; ordinary users cannot fix the defect on their own.

How to remove dead pixels on a computer monitor and mobile devices

There are quite a few on the Internet online services and standalone programs that can revive a dead pixel when the thin film transistor just freezes a bit.

An online check of the monitor for dead pixels can be performed 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 broken pixels online can be done on 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 randomly changing pixel colors. Set the window to the broken pixel and leave it for one or two hours. Such treatment in 50% of cases ends with success.

We remove dead pixels by mechanical action

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

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

Useful information:

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Question from user

Hello.

I have some kind of white dot in the center on my monitor, and another red one in the corner. The one in the corner - I don't care about it, but in the center - sometimes it annoys and interferes. When a color picture is shown, it is not so noticeable, but with a monochromatic (and especially dark) picture, it does not look very good.

They refused to repair the monitor, they say that you can’t restore these broken pixels (it’s easier to buy new monitor). Is this true, and is it possible to somehow remove these points, restore broken pixels?

Michael.

Good day!

In fact, one of the common problems with monitors is the appearance of dots on the screen that do not change their color (ie do not work). Most often, they glow with just plain light: white, dark, red, etc. Such pixels on the monitor are called beaten .

In this article I will try to answer both your question and the same type related to this topic. I'll show you how to check your monitor for these dead pixels, as well as a few recommendations that can bring such pixels back to life. So...

To help!

Monitor check: do 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 annoying when you buy a new large monitor, and then in the process of working you find that one pixel in the center does not "burn" (more precisely, it burns red) . And what's even more offensive is that you most likely will not be able to return such a monitor back under warranty!

Important!

According to the standard, monitors are divided into different 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, IV - class is essentially a marriage (and they are not available on the mass market), most often, an ordinary home monitor is a class II or III device. Therefore, for delivery under warranty - you need at least 2-3 dead pixels. This is all to the fact that checking when buying is very important!

How many dead pixels are allowed on the monitor (depending on its class). Important: This plate is just an example, non-compliance regulations change frequently.

And so, now about how to check ...

The essence of the check: you need to fill the screen alternately with different colors: white, red, green, black, etc. With each fill, be sure to carefully examine the entire surface, 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 on that below).

With the help of the program IsMyLcdOK

One of the best utilities to check the monitor for broken pixels!

The utility is very simple and does not need to be installed and configured. It weighs only 36 Kb, and it can be written to any medium. After starting - you just need to press the numbers on the keyboard: 1, 2, 3, etc., or the Ctrl key - and the entire screen will be alternately filled with different colors. All you have to do is watch what is happening.

Thus, using IsMyLcdOK, you can evaluate the state of the monitor in a few minutes. Definitely recommend to use!

The main advantages of the utility:

1. small size - only 36 Kb, can be written to any flash drive;
2. nothing needs to be installed or configured - just run and press one Ctrl button;
3. The utility is free and works in all Windows versions.

Online way

Monitor Test

A very simple and effective utility that can revitalize (restore) dead pixels. The utility is free, works in all versions of Windows, takes up very little space. In addition, with her work, you can simultaneously go about your business. That is why I fixed my eyes on her ☺.

How to work in it (step by step):

Method number 2: discharge ...

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

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

If you have a regular PC monitor: Also disconnect 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, the residual voltage will leave the thin-film transistors. And when you connect the monitor to the power supply and turn it on, the stuck pixel will be shaken, perhaps it will return to "life" (I note right away that this method does not always help, in about 5-15% of cases).

Method number 3: mechanical pressure

If the software method did not help, try taking a cotton swab (or a pencil with an eraser on the end). Then set this wand 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 has not started working, repeat the operation (you can slightly increase the effort). So try doing 20-50 iterations.

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

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

This article will tell you how to fix a stuck LCD pixel that has stopped changing colors. A pixel is usually stuck at some color other than black or white, and the problem can often be corrected with a couple of various ways. If the pixel turns out to be broken, and not stuck, then it will be impossible to fix it. Likewise, while you may have a chance to fix a stuck pixel, there is no guarantee that you will successfully fix it.

Steps

Part 1

Preparation for work

Make sure the pixel is really just stuck and not broken. Although it is not uncommon for the terms "broken" and "stuck" pixel to be used interchangeably to refer to problem pixels, stuck pixels can be fixed while dead pixels cannot. If a pixel has a specific color other than black, or doesn't change color correctly based on the background color, it's most likely just stuck.

• Dead pixels usually remain white or black no matter what happens on the screen. Despite the fact that 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 take it in for repair or replace the screen. Also sometimes (but not always) broken pixels fall under the manufacturer's warranty to replace the device or its screen.

1. Understand how pixels work. Pixels reflect combinations of red, blue and green 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 displaying colors that are too saturated for an extended period of time. When a pixel is stuck, it displays only one color, which may change slightly depending on the color of the surrounding pixels.

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

2. Check the warranty conditions for your LCD monitor. It is not uncommon for manufacturers to be willing to replace a monitor when it has a certain number of stuck or dead pixels. If your monitor is still under warranty, it's 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 is stuck recently, then the problem may disappear by itself - just turn off the monitor for a day. There is no guarantee that you will fix the monitor this way, but the presence of a stuck pixel often indicates that the monitor has been used for too long and it is better to turn it off for a while to prevent further damage.

   • Unplug the monitor completely.

3. Consider taking your monitor in for repair. Even if your monitor's warranty has already expired, paying for a professional repair will be cheaper than buying a new monitor due to an accidental failure of the device as a result of self-repair.

   Know that a 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 have only one pixel stuck on an expensive monitor, it is best to refrain from tapping, rubbing, or other physical impact on the monitor in order to fix the pixel.

   Part 2

   Using software to fix screen problems

   1. Understand how this method works. The screen repair software shows random combinations of red, green and blue at up to 60 flashes of color per second to bring the pixel back to normal.

      • 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 to restore monitor screens. However, free programs are just as effective at repairing pixels that can actually be fixed.

   2. Refrain from using stuck pixel repair software if you suffer from epilepsy. Since such software displays erratic flashes of rapidly changing colors on the screen, you should not use it if you (or someone in your family) has epileptic seizures.

      Go to 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 start 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.

      Find the stuck pixel. The main part of the screen will be black, so you can easily find the stuck pixel.

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

   3. Move the app's flickering repair block onto the stuck pixel. Click and drag the flickering block over the problem pixel, then release.

      Leave the app running for at least 10 minutes. At the same time, in no case do not minimize the window, do not move the repair unit and do not turn off the monitor.

      • If possible, leave the application running for an entire hour.

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

   Part 3

   Impact on the problem pixel with pressure and heat

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

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

   1. Turn on your computer and LCD monitor. The monitor must be turned on for this method to work.

      Open the black image. It is extremely important that the screen is actually showing a black image and not in a no signal state, as you need the LCD monitor to have its internal backlight working.

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

      • Please read the warnings at the end of this article before moving on. 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 the object is able to pierce the napkin, then it is too sharp. Find something else.

   3. Use the rounded end of the object to gently apply pressure to 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. Remove the item after a few seconds. If the pixel stays the same, you can re-apply this method or switch to using heat. However, if the problem is resolved, immediately turn off the monitor and do not turn it on for at least one hour.

      Dampen the washcloth with hot water. If possible, heat the water on the stove to the first signs of gas bubbles at the bottom of the container (about 88 ° C), and then dip the washcloth there and soak it in hot water.

      Protect your hands. In order not to burn your fingers in the next steps, use an oven mitt or a thick napkin.

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

   5. Apply a bag of washcloth to the stuck pixel. Light pressure through the washcloth should loosen the contents of the pixel a bit, potentially helping to fix it.

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

You have discovered that something is wrong with the monitor of your favorite computer, laptop, smartphone, TV or tablet. Namely, one or more white, green, red or blue dots appeared. What's this? You have dead pixels. The problem is small, but still annoying. Even a couple of such points are not encouraging, especially if the screen is small. The way out of the situation is the restoration of dead pixels using certain programs or mechanical. How exactly to "cure" the screen, we will share with you further.

A bit about pixels

Before we begin to analyze the recovery of dead pixels, let's figure out what it is. First, the basic concept. A pixel is a small part that makes up an image. It consists of three components (subpixels) of red, green and blue.

There are two types of bad pixels:

• Broken (hot, stuck). Either one or two subpixels are defective. What does a dead pixel look like? The dot can light red, green, cyan, yellow, magenta, or blue. May appear black in some images. Less often, all three subpixels do not work, then the square glows white. Recovery of dead pixels is possible!
• Dead. This is the kind of defective pixels, which, unfortunately, can no longer be restored. The dots do not light up in any color, they look black on any background. The solution to the problem is to replace the screen.

Reasons for the appearance

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

Hence, no microprocessor technology can guarantee the output of completely non-defective crystals. It can be said that there are no matrices absolutely free from low-quality pixels. One or two dead pixels is the norm for almost any screen. A problem is considered when their number continues to increase.

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

• Excessive heating of the device.
• Excessive cooling of the device.
• Being close to powerful sources of electromagnetic fields.
• Physical influences on the screen - blows, tapping, falling, pressing, etc.

Sites to check

How to check your monitor for dead pixels? The easiest way is to go to a specialized site, which can be found on the corresponding search engine request. All resources of this type act in the same way: the screen is filled with a certain color, a group of shades, gradients, which easily make it possible to find a faulty pixel on the monitor.

Let's share examples of such sites:

• Monteon.ru. The advantage of the resource is that the check is available for both computers and smartphones and tablets. You need to go to the resource, click on the "Start" button. The screen will be covered with 7 color bars. Using the arrows, you can change their position to search for dead pixels. There is only one drawback: the lower part of the window is used for the menu, so it is impossible to find dead pixels using the site.
• Tft.vanity.dk. This site is more convenient than the previous one, since the menu in it is pop-up. Contains a large number of pictures to help detect dead pixels.
• Video on YouTube. Users uploaded a lot of video files to a popular video hosting to search for dead pixels. You only need to turn on the video and expand the full screen view.

Programs for verification

How to check for dead pixels TV, computer? We suggest using the following testing programs:

• IsMyLcdOk. An easy-to-use utility that does not require installation. You only need to download and run it. A hotkey menu will appear in the window, which will explain how to control the change of colors on the screen in order to find faulty pixels.
• DPT. The utility is launched from the official website. Here you can change colors by scrolling the mouse wheel, or by setting them to change on the auto-timer. It is possible to play with the color scheme to better find faulty points.

Recovery on TV: method number 1

Let's move on to action. How is the repair of dead pixels on the TV? The first way - "massage"! That is, the physical impact on the faulty pixel:

1. Turn off the TV.
2. Take a soft cotton swab and gently press a few times on the area of ​​the dead pixel.
3. After a couple of minutes, turn on the TV to check.
4. If the procedure does not bring a satisfactory effect, you can repeat it several times.

Remember that the display is extremely fragile, so you should not use sharp, piercing or scratching parts for "massage".

Recovery on TV: method number 2

A safer way to repair pixels on a TV is remote. That is, with the help of specialized applications. One of the most popular is JScreenFix. The developers claim that this utility helps to cope with the problem after half an hour of exposure. If the first procedure had no effect, then it is worth repeating it several times every four hours.

Recovery on TV: method number 3

What is the easiest way to repair dead pixels on a TV? This is the delivery of the device in warranty repair or writing an application for its replacement.

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

Recovery on a computer

"Treatment" of dead pixels on computers and laptops also occurs in two ways: mechanical and software. How do utilities help? The program quickly changes the colors of adjacent pixels. This process causes the damaged sub-pixels to receive more energy, causing them to "come to life".

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

Do not assume that "treatment" will help once and for all. The problem may return, especially in hot weather. Then the restoration of dead pixels on the monitor will have to be repeated.

Below we will present the most popular programs for "treatment".

UndeadPixel

Experts advise using not a portable variation, but a version for installation. After launching, the program will prompt you to check the screen for dead pixels. The monitor will be completely flooded with blue, red, yellow, white, black colors. If you know the location of the dead pixels, then you can skip the step.

The work UndeadPixel is a special square in which colors alternate quickly. It should be moved with the cursor to the problematic place - where a dead pixel is found. The number of squares, their size, the speed of changing colors can be adjusted in the program menu.

Is the problem pixel flickering? You are close to solving the problem. Otherwise, increase the speed of changing pictures, leave the square to work for a long time. Maximum - 10 hours. If this does not help, then there is no point in waiting any longer.

JScreenFix

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

JScreenFix operates similarly to the previous program. There is only one difference - the recovery parameters (frame rate, impact size) cannot be adjusted independently here. In addition, during the "treatment" JScreenFix will not be able to work with the device. If the problem does not enter the browser window, then the service can be expanded to full screen.

Bad Crystal

On the official website, you can download both the "advanced" paid version and the free version available for 30 days after download. However, if you search well on the Internet, you can also find a fully functional free Bad Crystal.

Recovery of broken pixels on the monitor begins with the choice of a device for "treatment" - you need to know the screen resolution. Great for computers, laptops, game consoles, smartphones and plasma panels.

There are four recovery modes available for computer monitors. Only two of them are free. The remaining paid ones, according to the creators, guarantee a higher percentage of recovery. For phones and tablets, a special video file is generated that should be played on the device in a repeating mode. For a TV, the video is recorded to a disc or flash drive. You can also connect to your computer as a second monitor.

On the computer, the working window moves to the area of ​​​​the broken pixel. After 10 minutes, the effect is checked. If not, then it is worth increasing the frame rate. According to the developers, not only dead pixels can be cured in this way, but also spots, of course, if they are areas of non-working pixels. Also, the program can be used to prevent problems.

"Massage" monitor

Many users note that the most effective way recovery of broken points - mechanical. Let's imagine a pixel "massage" algorithm:

1. Take a blunt soft object - a cotton swab, a pencil with an eraser on the end, and so on.
2. Lightly press on the dead pixel until the first streaks appear.
3. If there is no effect, then apply stronger pressure.
4. Did not help? We make circular movements with an object at a point - to the right and left sides. Repeat the steps several times.
5. Next procedure: press down on the dead pixel, then slide the tool up and then back. Repeat the movement down, right and left.
6. In case of failure, many turn to the risky step of repeating all of the above steps with a sharpened pencil through a cloth to avoid scratching the screen.
7. Sometimes a combination of mechanical and software methods helps a lot. Simultaneous work of Bad Crystal and massage with a cotton swab of a problem point for 15 minutes will be effective. The program is then left to run on its own for 10 hours.

Eliminate dead pixels on a smartphone

The solution to the problem on the gadget can be as follows:

1. Run in mobile browser JScreenFix according to the scheme that we indicated above.
2. For Android-based devices, you can download the Dead Pixel Detect and Fix application from Google Market, which works in a similar way.
3. Mechanical massage. Turn off the device and use a lint-free cloth for 10 minutes to massage the problem area with light finger movements. Turn on the gadget and repeat the same operation with the active display.
4. Make a heating pad by pouring it into a tight bag of hot water, wrapping it in a thick, lint-free cloth. This device should massage the problem area on the screen for 5 minutes.

Now you know how to deal with dead pixels on the screen of your device. Today, not only mechanical, but also software recovery methods are available.

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

Sellers argue this with the manufacturer's standards for dead pixels. And the allowable number of such pixels is unlikely to please you. So check right away.

Some damaged pixels are clearly visible, while others are more difficult to notice. It is better to use for verification special utility Nokia Monitor Test.

Testing for dead pixels

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

In total, there are three types of damaged pixels:

1) dark pixels that stand out against a white background. Can't fix it;

2) pixels that glow white against 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 have to put up with it. He burned out physically, so "unblock" will not work. If the monitor has broken pixels of the second and third types, 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 show up after a while. Such situations also happen. And when there is one or two of them, then not everyone service center wants to fix it. Especially if guarantee period expired. That is, you have to act independently. The problem can be eliminated by two methods: software and mechanical.

Repair of dead pixels on the monitor

In the first case, it is convenient to use the specialized Bad Crystal program. This free utility and its very easy to use. The principle of its operation is that in a selected area, colors change with high frequency. Due 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 gently massage the area of ​​​​the broken pixel. The main thing is not to overdo it. This should not be done with a finger or any hard object.

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

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

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

Technology is advancing at an incredible rate these days. LCD televisions have replaced the old cathode ray tube televisions. The design and dimensions of these TVs are changing. The contrast and resolution of the screens are increased. At first they were only flat, now concave ones have appeared, apparently the next step will be spherical television rooms. But, unfortunately, any technological development is not without drawbacks.

And the technology, which is based on the use of liquid crystals, is also no exception. It is extremely unpleasant when, during viewing, you notice a dot on the screen that you first take for dirt, you try to erase it, wash it off, but it does not 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, do not change their color when changing the picture. Such dots are called dead pixels.

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

Pixel work

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

Due to the fact that each pixel can glow in a different color, add to this also the change in the direction of the light beam of different power ... all this together ensures that each individual pixel acquires its own shade. And the glow of all pixels together contributes to the fact that a complete image is formed on the screen, which we observe 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. In the case when such a transistor fails, then on a light background we see dark dots, which we can at first take 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, then the dot acquires a permanent color (red, blue, yellow or green). Such a pixel is called stuck.

Dead pixel rate

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

For example, for the matrices of Sony, Sharp, Toshiba and some other brands, 0.3% of the broken pixels from the total number of pixels is acceptable. And such equipment is considered serviceable, therefore, it is not subject to exchange and return. Liquid crystal monitors are divided into classes according to the admissibility 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 color defective pixels are allowed. For screens of the third class, no more than five white, fifteen black and fifty color dead pixels are allowed. And for monitors of the fourth class, which, fortunately, almost never appear on our market, no more than fifty white, one hundred and fifty black and five hundred color defective pixels are acceptable.

Check for dead pixels

In the store, any salesperson will be happy to show you all the possibilities of the LCD screen. Color pictures with great speed will replace one another. The brightness and contrast of the image will affect 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, then you can immediately notice white and color faulty pixels. Black, white, red and blue damaged pixels are clearly distinguishable against a green color background.

Dead pixel checker

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

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

The dead pixel test is very simple, even primitive. The program changes the colors of the screen at your command, and you look at the screen and look for broken pixels that become visible at a glance.

Recovery of dead pixels

It makes sense to deal with the restoration of dead pixels if you notice them too late to refuse the purchase or to exchange the goods. 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.

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

If it does not help, then try to "massage" the faulty pixel by lightly pressing on it with a cotton swab. When massaging, remember that in this way, you can not only fix nothing, but also make 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 the dead pixels make the use of the device unacceptable, then you will have to buy a new one.

I now (when I am typing this text) have a Samsung monitor in front of my eyes, which 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, there are several extinct pixels that become noticeable when working in Photoshop and if you look closely, and in other modes of using the monitor they are completely invisible, so it didn’t even occur to waste your time on them :).

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Comments (3)

2016-02-08 21:14:11

I never thought about dead pixels, because I did not encounter such a problem. But, in the store, when I bought a computer, of course, they first checked it in operation.

2016-02-15 22:11:36

Oh that's interesting, I didn't know they existed. special programs to check 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 pixels, other pixels burn out faster.

2016-04-01 23:14:41

I work in an organization where it is practiced to sell used monitors to company employees at a small price. Now I can do a check for broken pixels myself - I made a black screen and everything is immediately clear!

CompoGid.ru

How to repair dead pixels at home?

Monitors have become a part of our lives. Society observes their presence daily on various devices and gadgets: a mobile phone, a computer monitor, a screen on a laptop, 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 broken monitor pixel.

How to understand that a pixel is faulty?

A dead pixel is a part of the monitor (dot) that does not match the displayed image in terms of color. As a rule, this is a dark pixel that is clearly visible against a light background. This type of failure does not involve 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 unnoticed. In the people, this breakdown is called "stuck" pixels. Unlike the first option, this problem can be treated in two ways: programmatically or mechanically. It does not require any special equipment or laboratory conditions to operate. All actions can be performed at home.

How to find dead pixels on the screen?

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

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

A good example would be free service Onlinemonitortest. It prompts its visitors to select monitor tests from the list:

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

This service is a useful resource not only for identifying bad pixels, but also for adjusting various settings on your monitor.

From useful programs note the TFT test. This program has an intuitive interface and does not require installation on a computer. It will be enough just to download it. A large number of tests as part of the program are able to identify all screen defects and adjust it for comfortable work.

Recovery methods

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

Programmatic way

The result is achieved by quickly changing the colors of adjacent pixels. As a result, the "stuck" pixel gets large quantity energy, and he recovers. 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 a temporary result, and after a while, multi-colored dots may reappear on the monitor. If this happens, the procedure should be repeated. Some pixels cannot be permanently cured.

mechanical method

If the treatment by the software method failed, it is worth using the mechanical one. The process of such recovery looks like a normal wipe of the monitor. You can use a cotton swab, with which you can rub with sufficient force the part on the monitor where the dead pixel is located. The force of 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 flick your fingernail over the area where the dead pixel appears.

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

Description of programs that restore pixels

More details should be said about the programs that are used in the program method. The most popular programs that repair dead pixels are Bad Crystal, JScreenFixDead and DeadPixelTester.

BadCrystal

This program is the most commonly used. It is widely available on the Internet and you can download or buy it. The free version only works for 30 days and it has limitations on a number of services. You can find the previously released version of BadCrystal 2.6. It is also free and works without limitation of features, but it only lasts one minute. In order to eliminate this nuance, you can use a kind of "crack": hold the left mouse button and move the program window, without releasing the button, press it down with some object (book, glass, keyboard). In this position, 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.

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

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

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

By default, CCM mode is selected. Launch it by clicking Launch. We move the program window to the area where the glowing dots appear, let the program run for 5-10 minutes, after which you need to check the result. If there are no changes, repeat the procedure at an increased speed, for which you need to use the active SpeedUp button. We leave the program to work for 10-15 minutes.

Therefore, you can try again using the 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 remove all problem areas completely.

JScreenFix

This is a Java application that can be used without installation on a computer. IN free access You won't be able to download it, there is only a paid version on the Internet.

Getting started with the program is to find the area that needs repair. To do this, select the Locale button in the menu and the program window becomes 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.

Then you can go 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 that demonstrate the algorithm of the program. This feature is provided free of charge. Such tracks can be played with a player convenient for you on any device, but this treatment will bring less effect due to the difference in image resolution.

DeadPixelTester

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

Repair of this problem, like broken 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 a laptop

Dead pixels on a laptop are non-working, luminous dots or parts of them. A non-working pixel is black and can be seen on light or white tones. It cannot be cured. A glowing red, magenta, yellow, blue, or green dot is a dead pixel on the monitor or a sub-pixel.

How are dead pixels removed?

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

• program,
• mechanical.

Programmatic recovery

The software method implies a quick change in the colors of neighboring pixels. Thus, the sub-pixels receive a large amount of energy and come back to life. With this process, you can recover 55%-80% of broken points. Restoring points can take a different amount of time. During setup, you will have to change the speed of replacing colors and work time programs.

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 broken pixel on a laptop cannot be cured.

Update dead pixels program

The Bad Crystal program can not only be bought, but also downloaded. You can use the program in test mode for 30 days for free, but some functions will not work. Developed earlier version Bad Crystal 2.6 has no restrictions in work, but at the same time open program works within 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 desired 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 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. It is not necessary to press hard with a wand until streaks appear, making a 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 did not give any result, then you can combine it with software. You need to start the program and at the same moment do a massage with a cotton swab for about 15 minutes, and then leave the program in working mode for another 10 hours. If this method did not get rid of the 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 in it. Let the article bring you only benefit.

www.spb.ru

Checking and repairing dead pixels. Part two

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

What are "broken pixels", what they are, how they are diagnosed and how they are 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 to know her here.

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

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

Software methods for the treatment of dead pixels

You met the ScreenFix Deluxe utility in our first article. We can only add that the 20 free minutes of work declared by the manufacturer are often not enough for a 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 of ScreenFix Deluxe posted ready-made video files for free download with a recording of the therapeutic effect of the program. There are files of different formats and for different resolutions of monitors. 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 you accurately determine the location of defective pixels. On the right side are the main settings. You can choose the number of dead pixels that you want to treat at the same time, 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 do not know him or are not sure of the accuracy of the information, leave it as it is. After launch, a small flickering area appears on the screen, which must be dragged with the mouse directly to the dead pixel. When you right-click on it, you can choose the colors with which it will flicker.

The program also has a small minus - the developers say that in order to obtain the desired effect, the utility will have to be "driven" for several hours. But there is a fat plus, in addition to being free - UDPixel can work in the background, and absolutely does not interfere with other programs. Those. During treatment, you will be able to fully use your computer. (If you accidentally minimize the main window of the program, 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 by 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 the treatment of dead pixels

To the massage options for defective areas described in the first part of the article, you can add the use of pressure on the back of an ordinary pencil with an eraser at the end.

Sometimes massage with a fingertip helps. You need to put your finger on the broken pixel, slightly press and move it 3-5 mm. You can shift 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 cloth or paper towel folded in half to avoid scratching the monitor. Take something with a thin but not sharp end - a PDA stylus is ideal. Place the tip of the stylus exactly on the broken 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 breaking 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 positioning accuracy of the stylus.

2.Turn on the monitor and put some dark image in order to see the dead pixel more accurately. Get a ballpoint pen or something similar. Place the rounded tip exactly on the defective area and press lightly so that a small whitish area forms around the point of pressure. Let go. You can repeat 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 for standalone monitors.

ATTENTION. This method is dangerous, as it can lead to overheating of the computer and to 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 backup all important data before using it.

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

There is another trick. It is necessary to disconnect absolutely all cables from the monitor connecting it to the computer and the network, 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 that, it is possible that the stuck pixel will start functioning normally again. Try it, sometimes it helps.

And, finally, one more extreme way to treat dead pixels.

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

Determine the exact location of the dead pixel. We bring a contrasting background under 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. We take a box from under the disk / SD flash drive or something similar (necessarily plastic, not very soft, but not hard either, as you can scratch the screen). Without turning off the monitor, we begin to massage the dead pixel with the prepared object. At the same time, the movements should resemble the movements of rolling out the dough - you kind of drive the "dough" from neighboring pixels (within a radius of 2-3 pixels) into the central, non-working one, then back from the non-working one to the neighboring ones (no need to make circular movements, you can scratch the screen ). It is not necessary to press too hard, but also too weakly. You need to press so that stains in the massage area are visible.

If after 30 seconds of hard work the broken pixel has not recovered, you can stop - there will be no sense anymore, you should not press 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 LCD matrix crystal lattice, then it is better not to try this method.

You can end there. We hope that one of the methods we have described will help you repair dead pixels on an LCD monitor.

Happy treatment!