The program shows the number of dead pixels. The best monitor tests online

Monitor testing programs invariably attract the attention of PC users. Perhaps among all information and diagnostic utilities they are the most popular. And all because every user will sooner or later worry about buying a new monitor. Simply choosing a manufacturer and model is not enough. According to the rules, when purchasing a monitor, it is necessary to meticulously test it, especially for dead pixels.

Why we test the monitor:

Monitor testing programs make the task of testing and adjusting a CRT monitor easier. Special test images (templates) make it possible to identify defects such as lack of convergence of rays for different colors, insufficient focusing and voltage stabilization, geometry distortions, low contrast, uneven glow of the phosphor, broken pixels. Having looked at several copies, we can select the one with deviations from standards are minimal.

LCD monitors require a different approach. All LCD panel based monitors cannot have problems with geometry, convergence, stabilization, focus, etc. And the spread of parameters is generally not typical for them, with the exception of “broken” pixels, which are still encountered, despite all the efforts of manufacturers. However, LCD monitors should also be tested. Just not different copies, but models from different manufacturers. LCD monitors differ significantly from each other in such parameters as viewing angles, inertia (afterglow and smearing), natural color rendering, color resolution, brightness and contrast, backlight uniformity. These parameters are either not indicated at all in the characteristics, or are measured using completely inadequate methods.

The other day I remembered how I bought a monitor in a store a couple of years ago. I then read a bunch of articles about how to choose the right monitor, how to find dead pixels, what color rendition should be, etc. Most of the authors of the articles advised downloading good juicy photos to your flash drive, the Nokia Monitor Test program and going with this “gentleman’s kit” buying a monitor...

He will provide you with everything you need tests to check your monitor before purchasing. Now you don’t need to take anything with you to the store - just ask the seller to type the address of the specified service in your browser, and you will be armed to the teeth)).

I’ll tell you what opportunities this online service provides for testing a monitor. You can choose three options:

• “Html Window” – running tests in a browser tab
• “Html FS” - running tests in a separate browser window with a resolution of 1280x1024 px
• “Executable Mode” - you can download tests in the form Windows applications and run them directly from your computer.

All these options are absolutely equivalent, so choose which one suits you best.

Immediately after starting the test, a page with a picture will open to check the monitor’s ability to display similar shades. On high-quality monitors, a two percent difference in dark tones can be discerned.

To switch to other modes, you need to move the cursor to the top edge of the browser window. A translucent menu will open in which other monitor tests will become available.

Color range

Assessment of color rendering quality when displaying smooth gradients of different tones. 9 different modes available.

Trailing

Test real speed matrix response. There are 6 test options available.

Homogenuity

Checking the uniformity of the backlight of the monitor lamps and checking for dead pixels. You can fill your monitor screen with five different colors.

1:1 pixel mapping

Test for the presence of stains, the so-called moiré.

Text

Checking the readability and blur of text on the monitor. You can choose both the color of the text itself and the background on which it is located.

Besides everything else, Online Monitor Test will be useful to you if you work on several monitors at once. Using the “Input Lag Html (Exe)” test, you can determine whether there is a delay between them in the output of the input signal.

Friends, I hope you liked this online test monitor. When you are ready to go to the store to make a purchase, do not forget to use it to choose a good quality copy.

Every buyer faces this interesting problem when choosing a new TV. It's no secret that when buying a modern TV in a store, managers offer paid service- check the TV screen for dead pixels and sound quality. The most interesting thing during the conversation is that they refer to service centers where, if you find one or more dead pixels, they will still give you a conclusion that the TV is working and there is no reason to return the defective product. After all, according to the ISO 13406-2 standard new TV with up to 7 dead pixels must be returned to the consumer without any claims to the store. You can find more information about this ISO 13406-2 on the Internet.

Yes, we know that according to the law of consumer rights, within 14 days the store that sold this TV is “sort of obliged to replace” the TV with another or return the money. This cherished word seems to calm. But not everything is as good as it seems. The store will replace your TV or return it cash, only when you bring an official conclusion from the warranty service center about the unsuitability of a product called TV.

To save yourself from wasting time and money, I recommend checking the TV before purchasing using a flash drive.

Checking a new TV for dead pixels from a flash drive

If you buy a modern TV with a USB connector, then checking for dead pixels is very simple.

photo 1

The archive below contains 9 photos with a resolution (1920x1080 pix) and a movie trailer in 1920x1080 mkv HD format. They need to be moved to a flash drive.

Install the flash drive into the USB connector of the new TV.

Using the TV remote control in the menu - connect USB flash drive. Then select viewing photos by pointing to our test photos in the menu.

We look through 9 colors of photographs one by one and in the case of a dead pixel or several dead pixels, we will see them on the TV screen.

photo 2

By viewing each of the 9 screensavers, you can easily determine the presence or absence of dead pixels on the TV screen even before paying for the purchase. Don't forget to check the sound quality in the folder there is a movie trailer in excellent quality and with good sound.

photo 3

Happy shopping!

Files for checking your TV for dead pixels

The files are archived with WinRar. Use the link below and download the archiver.

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, a certain sequence of colors is displayed on the screen; when each color is changed, 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. When buying such an 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. Eat complex check, identifying dynamic video distortions, determining the response time of the matrix, and the usual 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 different forms and shades will indicate the presence of a defect.
2. Banding - appears on static background any color in the form of light and dark stripes.
3. Highlights that are typical only for LED TVs. They are detected in a dark room when either a black picture or white text on a black background is presented on the screen. 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 well-known brands LG, Samsung, Philips, Sony requires 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.

How to check a monitor or TV for dead pixels, glare and other defects? For these purposes there are a huge variety of in various ways, and we will look at some of them in this article. But, friends, in this delicate matter, like checking a screen, what is more important is not the specific method of checking, not the tools used, but a clear understanding of what possible defects we are looking for. And we will also talk about this below. So, you are going to buy a monitor or TV. How to check it before buying it in a store or before accepting it postal parcel, if this is an online order?

Tools

To check the quality and integrity of a monitor or TV screen, there are a lot of different Windows programs and web services. Among the first:

• Utility included in the AIDA64 program,
• Nokia Monitor Test,
• EIZO Monitortest,
• Monitors Matter CheckScreen,
• PassMark MonitorTest, etc.

There are narrow-profile utilities only for checking for dead pixels, for example:

• Dead Pixel Tester and
• Pestretsov Dead Pixel Test.

From web services offering services for various tests for the quality and integrity of screens:

• Monteon.Ru,
• Tft.Vanity.Dk etc.

Each of these programs, each service, of course, has its own advantages, but I, friends, will tell you that you don’t need any particularly ornate tools to check your monitor or TV. Some of the tests included in such tools are needed not for verification, but for image adjustment. To check the screen for quality and integrity, you can use simple means at hand.

If we, for example, are looking only for dead pixels, in Windows environment 10 do this:

Go to the “Personalization” section of the “Settings” application;

In the “Background” subsection, set “Solid color”, click “Additional color”;

Choose a white, light gray or red shade on the color scale. Click “Finish”;

We go down to the last subsection and hide the Windows taskbar;

Finally, we remove the display of shortcuts on the desktop in context menu the last one.

We do the same in others Windows versions taking into account differences in personalization settings.

In this simple way we can check the monitor for dead pixels, glare and color rendering quality. If you need to check for highlights, then, accordingly, select black as the background image. We evaluate the behavior of problematic pixels when transmitting other colors, as well as the quality of color rendering in general, by alternately changing the color of the desktop background. We use blue, green, yellow, red, cyan and violet.

Regarding other nuances of the screen - smooth transition between colors, sharpness, correct geometry, lack of blurred boundaries, lack of trails during frame dynamics, etc. – You can check your monitor or TV using a video on YouTube. We go to the video hosting site and enter the query “monitor test” into the search engine. In the search results, we bypass all sorts of reviews and guides, and only run video tests directly.

We expand the video to full screen. Where you need to look closely, press the spacebar to pause and then continue playing the video.

Video tests on YouTube - often these are recorded screencasts of screen tests being completed by the same specialized programs and web services. But, friends, another advantage of video hosting is that with its help you can check the quality of the screen on “live” pictures. Those. the way we will use a monitor or TV in ordinary life. For example, Samsung has a special video to present all the beauties of the company’s products, which perfectly demonstrates the quality of color rendering and the reproduction of dynamic scenes by the screens.

How effectively does the monitor display video footage? high resolution, we can see with the help of artistic videos on search queries"4K" or "8K".

Foreign inspection territory

The above screen testing methods are applicable when we have a Windows device or the Internet. These conditions will not be in the mail. It’s also not a fact that an electronics store will allow us to use them. test computer install some of your own programs or surf the Internet. You can only rely on the reproduction of a universal content format. If you need to check a monitor or TV on foreign territory, a flash drive will help. You can transfer test images and videos to it. Almost everything modern televisions and some functional monitors include built-in USB media players. Only if we buy a monitor with basic functionality will we have to ask the supermarket to arrange a connection to some image source. In the case of mail, of course, there is nothing left to do but drag your device and cable there.

• Note: friends, please read this first. full specifications purchased monitor. If the model provides support for MHL technology, video and audio output from mobile devices through HDMI port or MicroUSB, you can check the quality of the screen when accepting a package at the post office using your smartphone. To do this, of course, you need an appropriate connection cable, as well as an application or media content for testing screens. The same goes for wireless connection technologies.

Where can I get media content to check my monitor or TV and put it on a flash drive? Pictures and videos need to be downloaded from the Internet. For example, I found a special selection of pictures with images for testing screens on Rutreker.

Well, now friends, let's get to the point. What screen defects should you look for? And how to look for them?

Correct color rendering

Color accuracy is a check of primary colors and shades to see how correctly the screen displays them. It can be checked using pictures like this.

Such images can also be used when setting up a monitor or TV - testing ready-made presets, adjusting brightness/contrast settings manually.

Smoothness of transitions (gradients)

Gradients - transitions of color shades - should be displayed smoothly, without sudden changes, without steps. Checked with pictures like this one.

You can also view gradient fills for each of the primary colors, for example, like this picture for the green spectrum.

Banding

Banding is vertical or horizontal stripes with a distinct shade of color.

Whether this defect is present is checked using pictures with a solid fill. Such pictures with primary colors (white, gray, black, yellow, blue, green, red, purple) must be part of the test content.

Tint

Tint is chaotic areas incorrect display white, usually with pinkish or greenish tints. To find this defect, we use an image with a solid white fill.

Geometric proportions

Images with grids of different sizes will help determine how correctly the geometric proportions of the screen are displayed.

Trail during dynamic video sequence

Test animation with fast moving objects will allow you to determine whether trails - traces from objects - remain on the screen during dynamic playback of the video sequence.

Dead pixels

When searching for dead pixels, we use a single-color image of white, light gray or red. It is broken, or dead pixels that can be detected immediately, this dark spots on the screen. So-called stuck pixels can glow as dots of white, red, green, purple, yellow or other colors. Stuck pixels, accordingly, will be visible when a contrasting single-color image is presented on the screen.

To detect any kind of pixel defects, you need to examine the screen up close. You can use a magnifying glass. If the TV or monitor is under warranty, look for defective pixels it needs to be checked additionally, but after purchase, when it has worked for a couple of hours. Problem pixels may not appear immediately, only when the matrix is ​​heated.

Highlights

Highlights are the light areas on dark background along the edges of the screen.

PLS matrices usually do not suffer from the problem of screen glare; MVA matrices do have them, but rarely. But IPS matrices and old TNs, alas, have this problem. When purchasing an IPS or TN monitor, especially the model budget segment, you need to check your purchase for any glare. To do this, you need to present a monochromatic black image on the screen and turn up the brightness to the maximum. It is advisable to carry out the test itself in a darkened room.

Here, friends, are the main problems of monitors and TVs that need to be checked before purchasing. If you have anything to add on the topic, write in the comments.