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How to test a new monitor. Programs for checking pixels on the monitor

The user consumes information through a monitor or laptop screen, so the presence of defects on it is unacceptable. The monitor itself is a fairly simple device, but at the same time quite fragile. The main trouble that a user may encounter when purchasing a monitor is the presence of dead pixels, that is, screen elements that are not capable of correctly transmitting colors. To avoid such a problem, you need to carefully check it when purchasing a monitor, and in this article we will look at how to do this.

Table of contents:

What is a pixel, what are dead pixels?

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

Please note: In modern monitors several million pixels may be used.

If one pixel or group of pixels is not working, the image on that part of the screen will not match the one sent to the monitor from system unit. There are several types of dead pixels:

  • Non-working. These pixels do not convey 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 working with RGB colors;
  • Constantly glowing pixels. These are pixels that are constantly lit in white.

Please note: Sometimes not just one pixel fails, but a group of pixels in a horizontal or vertical stripe, or “squares” of pixels, for example, 5 by 5 or 10 by 10 elements.

Why is it important to check your monitor for dead pixels when purchasing?

By purchasing new monitor or a laptop, be sure to immediately check for dead pixels. This is due to the fact that if you discover such a defect after purchase, it is far from certain that you can return the monitor under warranty. The point is that there is ISO standard 13406-2, which determines the permissible number of defective pixels for monitors of various classes.

This standard provides for the release to the market of monitors in 4 quality classes. Most best class– the first, the worst – the fourth.

Please note: Almost all mass-produced monitors are produced according to the second quality class, respectively, according to the standardISO13406-2 implies the presence of dead pixels.

According to standard ISO13406-2, the following number of non-functioning or malfunctioning pixels in monitors of various classes per one million pixels in the panel is allowed:

  • 1st quality class. There should be no defective pixels at all;
  • Quality class 2. No more than 2 permanently lit white pixels, 2 permanently off black pixels, 5 pixels with other defects are allowed;
  • Quality class 3. No more than 5 permanently lit white pixels, 15 permanently non-lit black pixels, 50 pixels with other defects are allowed;
  • Quality class 4. No more than 50 permanently lit white pixels, 150 permanently non-lit black pixels, and 500 pixels with other defects are allowed.

It is worth noting that valid value defective pixels does not mean that they are necessarily present on a monitor of one class or another. Monitor quality class according to accepted standards determined by the device manufacturer itself. Depending on what class it determines, additional warranty obligations are imposed on it.

How to check your monitor for dead pixels

When purchasing equipment in a store, there is always the opportunity to check it right on the spot, and in a situation with a monitor, this must be done. There are special applications, which allow you to check your monitor for defective pixels. Programs are available, both standalone and presented on various sites.

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 they are present on the monitor. Let's look at the main programs and sites that can be used for such a check.

Programs for checking your monitor for dead pixels

If you buy a monitor in a store, it is better to first record one of the programs described above on a flash drive in order to perform an on-site test.

Dead Pixel Tester

One of the most famous free applications to check your monitor for dead pixels. To use Dead Pixel Tester you need to:


Among the program’s capabilities, it should be noted that the function of changing modes can be set to a timer; to do this, you need to check the “Auto Color Cycle” box and set the time in milliseconds. After this, the modes will change automatically.

Another feature of the program is the creation of 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 any part of the monitor, this tool helps to verify this.

IsMyLcdOk

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

When you first launch the IsMyLcdOk program, information will appear that describes what you should click to perform the test. To return to the instructions after starting the diagnostics, you will need to press F1.

To test, select the mode using the buttonsF2-F5. Among the monitor test modes available in the IsMyLcdOk program:

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

Besides special regimes, it is also possible to simply switch colors or gradients.

Sites for checking your monitor for dead pixels

If you don’t want to download a program to your computer to check your monitor, you can use sites with similar functionality. Let's 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.

Monteon

A simple and functional service for testing your monitor for dead pixels.

To use the service you must:


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

Please note: ServiceMonteon, unlike the programs discussed above, has a mode in which looped video is shown. IN this mode You can check the pixel color refresh rate.

Vanity Monitor Test

Quite an old, but well-proven service that allows you to test your monitor. For work of this service will need to have a Adobe computer Flash Player, which can be considered its disadvantage. To start testing, you must click " HTML Windows».

Selecting an operating mode in the Vanity program Monitor Test done through the drop-down menu at the top.

Treatment of dead monitor pixels

Dead pixels on the screen are not always a death sentence. In some cases it is possible to get rid of them and make them function again standard mode. There are several ways to do this:


If none of the above methods did not help restore the dead pixel, you will have to put up with it, or replace the monitor.

Everyone knows that a monitor is one of the important components of any computer. So that you can see what actions you are doing using emulators (mouse and keyboard), you need a monitor with good resolution and properties that do not damage vision. Like any equipment, monitors can break and become damaged. One of common problems– presence of dead pixels.

Dead pixel- This minimum element a monitor that does not change its color. In other words, it can remain white, black or any other color, although the monitor image changes. If you have a monitor with a high resolution, this will not be particularly noticeable, but if there are a lot of dead pixels, then you will see them even with the naked eye.

I would like to note that even in a store they can sell a monitor with dead pixels. Unfortunately, there is a standard that requires a few broken squeaks, so it will be very difficult to return it to the store.

IN this material I want to present several utilities that will help you find dead pixels on your monitor, and also help you buy only high-quality monitors.

IsMy LcdOK

This utility is designed to find dead pixels on any monitor. The essence of the program is that it paints the screen different colors, in which you need to press the number keys on the keyboard. After several fills, you will be able to see dead pixels on the screen. Look very carefully.

So, you launch the program and press the numbers from 1 to 9 one by one. It works in Windows family no problem, from any version. It weighs several tens of kilobytes and does not need to be installed.

http://www.softwareok.com/?seite=Microsoft/IsMyLcdOK

Dead Pixel Tester

Dead pixels can also be found using software such as Dead Pixel Tester. You need to launch the downloaded program icon (does not require installation) and change colors and pictures. Or just press a button A and wait until the program itself begins to change colors. All you have to do is watch the monitor closely.

http://dps.uk.com/software/dpt



This is interesting:

The last item on this list is online service for checking dead pixels. This option is the most convenient and no less effective. You just need internet access and that's it. Go to the specified resource and change colors while looking at the screen. By the way, this site also has a utility that you can download to your PC.

http://tft.vanity.dk/

So, unfortunately, nothing can be done about dead pixels. By at least you will know how many you have. When buying a new monitor with dead squeaks, returning it back will be problematic, and all because the standards provide for the presence of several dead pixels.

Broken beeps can appear from improper use of the monitor. Read the material about. There you will learn about cleaning your monitor screen and several rules for careful handling.

Good afternoon.

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

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

There is one nuance: Even when buying a new monitor, you may be given a monitor with dead pixels. The most annoying thing is that a few dead pixels are allowed by the ISO standard and returning such a monitor to the store is problematic...

In this article I want to talk about several programs that allow you to test your monitor for dead pixels (well, and protect you from buying a low-quality monitor).

I sMyLcdOK (best dead pixel search utility)

Rice. 1. Screenshots from IsMyLcdOK during testing.

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

Advantages:

  1. To start the test: just launch the program and press the numbers on the keyboard one by one: 1, 2, 3 ... 9 (and that’s it!);
  2. Works in all versions of Windows (XP, Vista, 7, 8, 10);
  3. The program weighs only 30 KB and does not require installation, which means it can fit on any flash drive and run on any computer with Windows;
  4. Despite the fact that 3-4 fills are enough to check, there are many more in the program.

D ead Pixel Tester (translation: tester dead pixels)

Another very interesting utility, which quickly and easily finds dead pixels. The program also does not require installation, just download and run. Supports all popular Windows versions(including 10).

To start the test, just launch the color modes, change pictures, select fill options (in general, everything is done in a small control window, you can 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 at short intervals. Thus, in just a minute, you will decide whether to buy a monitor...

Monitor test (online check monitor)

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

Which, by the way, won’t always be possible to do - since the Internet is not available in all stores where they sell equipment (connect a flash drive and run a program from it, and in my opinion, it’s faster and more reliable).

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

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

If after purchase you find a dead pixel on the monitor (and even worse, if it is in the most visible place), then returning it to the store is very difficult. The bottom line is that if you have less than a certain number of dead pixels (usually 3-5, depending on the manufacturer), then they may refuse to change your monitor (in such cases).

Happy shopping :)

A monitor, as a necessary element in a personal computer system, is important for people working on a PC because thanks to it it becomes possible to see the result of their actions in the form of accessible and visual information shown on it. Since a person interacts with the monitor much more than other parts of the computer, for example, microcircuits and boards, it becomes clear that the appearance of dead pixels on it has an extremely negative impact on a positive psychological state and does not allow one to fully experience true pleasure while working or Have a nice time behind the screen.

Therefore, you will need to know how to identify the presence of dead pixels on your monitor and how to fix them in a manner acceptable to you.

What is a dead pixel?

Under the concept of "pixel" experts in the field computer equipment understand the smallest unit on the monitor, with the help of which an image is displayed on it. As a rule, modern displays contain tens of millions of similar tiny units.

In turn, a “dead pixel” means a pixel that, for some reason, has lost the ability to display color correctly graphic object. What types of broken or, in other words, Do experts identify “dead” pixels?

There is another classification of defective smallest image units on the monitor. So, depending on the degree of malfunction The following types of pixels are distinguished:

  1. Completely inoperative.
  2. Working but showing the wrong color.

What to look for when buying a display?

Regarding the quality of screens, it is accepted international standard ISO 013406-2, according to which There are 4 types of displays. The first type of display is the only one that should not have broken smallest image units; all other types allow the presence a certain amount"dead" pixels. You should be very careful with these “dead people”, because their presence can seriously complicate the process of returning your purchase to the seller. Therefore, before purchasing a new monitor, especially with one, it is extremely important to conduct a test and make sure that everything is in order with the color rendering quality.

Checking your monitor for dead pixels: how to do it?

Typically, such a procedure performed using tests, built in specialized programs, which usually work on the following principle: they fill your display with any group of colors, one color or a gradient, so that you can, after carefully examining the screen, detect the smallest unit of the image that is not working.

Depending on what you are more accustomed to doing, you can use the services of programs that perform online testing, or install their offline analogues on your PC to test the monitor with IPS matrix and its diagnosis.

Online sites with display test programs

There are a significant number of players in the market for this niche, so we will highlight its most prominent representatives.

First of all, this is a website located at: monteon.ru. Its important advantage is that it can test not only the monitor of your PC, but also the screen of your smartphone. To check your monitor for problems with the smallest picture units, follow these steps:

  1. Go to the website via the link monteon.ru.
  2. Find the “Start” button on it and click on it.
  3. As soon as the program starts working, you will be presented with seven color stripes. At the bottom of the program there is a control panel with which you can change the color of any strip you are interested in, change the order of stripes, etc.
  4. In addition, there is a special drop-down menu in the control panel where you can select the sharpness of the color bars, as well as the presence or absence of flicker and gradient.

Please note that the tool for identifying dead pixels on the website monteon.ru has one, but very important flaw. The fact is that it is impossible to check the lower part of your display, since the lower part of the program window is occupied by the control panel.

On the website http://tft.vanity.dk, the above minus of monteon.ru was easily solved thanks to the menu that pops up when you hover your mouse over a certain area of ​​the program window. Additional benefit This site is that it will help you identify black or, in other words, generally non-functional pixels that are not capable of color reproduction. In order to start testing your monitor, including those with an IPS matrix, just go to the above site and click on the button labeled “HTML Windows” and wait some time until the test is completed.

Stand-alone programs for testing the screen for dead pixels

The most popular of them include the following programs:

  1. IsMyLcdOk is very simple utility in use, which does not even require you mandatory installation. Just download it from the Internet and run it. After this, the program’s working screen will appear before your eyes, which displays the key combinations intended to launch a specific function. Using the number keys from one to zero, you can select the desired gradient or color by which you will track the “dead” smallest units of the image on the screen of your monitor with an IPS matrix. If you need not a solid color or a gradient, but a picture with different colors, then use the F2, F3, F4, F5 keys.
  2. DPT. This utility has one extremely important advantage, which allows you to put it ahead of IsMyLcdOk. This is the presence of much greater functionality. To take advantage of DPT, visit http://dps.uk.com/software/dpt and download the utility from there. After downloading and launching the utility, you will be able to take advantage of the wide variety of color patterns offered by the program, which are located in the drop-down menu called “Pattern”. One more interesting feature program is that you can set the change color range automatically by setting the timer parameters you need. For particularly difficult cases, when detecting dead pixels on the screen of your device is extremely difficult, you can use a utility function called “Exerciser”. This function creates a square small sizes, which you can drag with the mouse across the entire screen and, if necessary, set gradients or colors that interest you within this square.

How to restore the performance of a dead pixel?

If you find one or more dead pixels on your monitor, do not despair and immediately go to the seller to demand compensation for the damage caused to you. The problem can be solved much easier and faster because exists special software , which is designed specifically for troubleshooting problems in the smallest image units. The name of this utility is Bad Crystal.

The principle of its operation comes down to the fact that in the place where you found a “dead” pixel, the program begins to change colors in accelerated mode. There is a fairly high probability (about fifty-fifty) that this will help restore the broken pixel to its lost ability to reproduce normal colors. Of course, you have the ability to influence the rate of color change by setting it in the appropriate settings section in the utility.

Once you have completed setting the settings you need, drag active window to the location you need, run the utility and wait a few minutes. Then check if the result appears and if the dead pixels have disappeared. If this does not happen, then activate the software again. Keep in mind that the result of the utility’s actions may be not only the healing of your display from the “dead” smallest image units, but also the appearance of new dead pixels due to frequent changes in the color gamut on the display while the software is running, so do not leave things to chance and carefully monitor the process of healing your monitor from dead pixels.

When buying a monitor, laptop or TV, there is an indicator that is not advertised by the seller, and most buyers do not pay attention to it. And only after purchase they may wonder what these colored or black dots are on the screen. As you know, the screen consists of dots - crystals, each of which is capable of changing color depending on the signal applied to it. This is how the picture is formed on the screen. There are situations when a crystal either cannot change color from its original black color, or, having received one color, is not able to change it to another. It's time to figure out what checking for dead pixels is, how to identify them and how to deal with them.

Visual inspection - nothing is easier

The simplest and quick check matrices for dead pixels of a monitor or TV screen are visual inspection while turning on the device and playing color, dynamic video. If the screen matrix has a dead pixel, it is easy to detect; just look closely at the screen. Pay attention to the dots that do not change color during video playback. The color of such dots can be white, black, red, blue or green. Many stores whose main focus is the sale of television and audio equipment have special generators whose task is to check for dead pixels. The test consists of submitting a sequence of color fills over a certain period of time, which allows you to detect a defect in the matrix.

Built-in testing program - a step towards the buyer

Over the past few years, well-known manufacturers, trying to please the buyer, have added specialized functionality to their TVs. Checking for dead pixels on a TV is done using one button. When the program starts, the screen displays specific sequence colors, when changing each one, you can see the dots on the screen that did not have time to change their color. For TVs that do not have a function for checking the screen for dead pixels, you can use other checking methods. For example, launching a special video with external media information or connecting the TV to personal computer or a laptop as a second monitor in order to perform a software test.

Specialized pictures and videos will help

Buying a TV, laptop or monitor is often a pre-planned purchase. Reviews on the Internet and popular publications are studied, a list of necessary technical characteristics- it takes more than one day. Checking for dead pixels of the screen matrix can also be planned by the buyer in advance. Buying so expensive device, you can always find an hour of time to record a set of special pictures or testing videos on a portable memory module, which are stored in huge volumes on the Internet. For example, a video testing the quality of changes in dynamic scenes, called “Japanese woman on a rope.” If watching a video causes discomfort - the image doubles, the image of trees and the girl’s clothes is blurred, then the TV has failed the test. It is important to remember that testing and checking for dead pixels on a TV, monitor or laptop is not comparable in time to what will be spent on warranty repair or exchange of goods.

Programs for testing

Checking your monitor for dead pixels can be done using a third-party software. Do not forget that thanks to the presence of additional video inputs on the TV, you can connect it as a monitor to a computer or laptop, performing testing that is no different from testing a monitor. There are a lot of such programs today. There is a complex test that detects dynamic video distortions, determines the response time of the matrix, and a regular check for dead pixels. The program for any testing does not take up much space and can fit on any storage medium. Among the applications for testing the screen matrix, TFTTest, DeadPixelTester, Nokia Monitor Test and the popular online test tft.vanity.dk have proven themselves. The test of any device is carried out only when the screen resolution is set to the manufacturer’s recommended resolution.

Pitfalls that few people know about

Checking your monitor for dead pixels is fundamental, but does not address some others. pitfalls that a user may encounter when purchasing a device. Most LCD screens have factory defects, which the average user is not even aware of, attributing it to poor-quality video recording.

  1. Tint - white balance. To identify this defect, you need to display a static white sheet on the device screen. Stripes, spots of different shapes and shades will indicate the presence of a defect.
  2. Banding - appears on a static background of any color in the form of light and dark stripes.
  3. Highlights that are typical only for LED TVs. Detected in a dark room when either a black picture or white text on a black background. The light on a black background has white blurs. If the background is black with text, then the text itself blurs.

What about the guarantee?

Yes, you can exchange equipment under warranty, but there are some requirements that you need to know.

  1. If, within fourteen days from the date of purchase of the device, dead pixels are found, you can, without a twinge of conscience, if you have a purchase receipt, return the equipment to the seller, under the guise of the law “On the Protection of Consumer Rights.”
  2. Using the manufacturer's warranty, you can exchange equipment in the store, according to the classification. For first-class devices, such as Pioneer and DreamVison brands, one dead pixel is enough. For Class 2 devices such as Panasonic, Sharp or Hitachi, the dead pixel test should show between 5 and 10 defects. The most popular third class with famous brands LG, Samsung, Philips, Sony require a minimum of 50 dead pixels.

Don't despair - massage can solve the problem

If you were unable to exchange your device under warranty, you can try “artisanal” methods for eliminating dead pixels. There are two ways to solve the problem.

  1. Having previously determined the location of the broken pixel and disconnected the device from the network, you can try to restore the operation of the crystal using a physical massage of the defective area with a cotton swab. The probability of restoration is low, but sometimes it eliminates manufacturing defects.
  2. Using special program, if checking for dead pixels shows a defect, you need to connect the monitor or TV to the computer and try to restore the operation of the crystal using a hardware massage. Manufacturers of massage programs claim that there is a high probability of solving problems. As an example: such programs include Bad crystal, JScreenFix, Pixel Repair.


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