How many dead pixels are allowed? Dead pixels Tolerance of dead pixels on the TV.

Dead pixels and subpixels on TFT matrices of monitors, laptops and TVs, unfortunately, is the norm for display manufacturers, defined by the standard ISO 13406-2

Standard ISO 13406-2 defines 4 quality classes of monitors:
Class 2- the most common and allows no more than 9 defective pixels for every million pixels. Practically all manufacturers' products comply with class 2 and if you come across a product without defective pixels - YOU ARE LUCKY! But be prepared that the luck factor is greatly reduced with increasing resolutions and, for example, if you buy a laptop with a WUXGA matrix without defective pixels - YOU ARE VERY LUCKY! If there are 1-5 of them, you are very lucky.
Class 3- allows the presence of no more than 70 defective pixels per million pixels of the matrix.
Class 4- the lowest, allows the presence of no more than 700 defective pixels per million pixels of the matrix. Fortunately, according to our records, LCD manufacturers do not release Class 4 monitors for sale to end users through the distribution line.
Class 1- the highest, does not allow the presence of defective pixels, but none of the manufacturers we know corresponds to this class throughout lineup... Recently, however, a series of products from selected manufacturers have begun to appear that do not have defective pixels.

How many pixels are on the matrix?
It is very simple to calculate, you just need to multiply the number of vertical lines by the number of horizontal lines.
Examples:
XGA - 1024x768 = 768432
WXGA - 1280x800 = 1024000
SXGA - 1280x1024 = 1310000 etc.

What kind of pixel defects are there?

The standard distinguishes between 4 types of defective pixels:

Type 1: Constantly lit pixels visible as a white point.

Type 2: Constantly lit pixels visible as a black point.

Type 3: Pixels with other defects, including defects in the subpixels and RGB cells that make up the pixel. This means constantly lit or flashing red, green and blue pixels. Experience has shown that this is the most common defect.

Type 4 (defective pixel group): several defective pixels in a 5 x 5 pixel square.

Now see how many defective pixels are allowed per million pixels of the matrix according to ISO 13406-2:

The specific values ​​are shown in the following table:

P.S. If the matrix contains 1 million and one pixel, the defective pixels are rounded up.
For example, for a WXGA class 2 matrix with 1,024,000 pixels, defects of type 1 - 3 pcs., Type 2 - 3 pcs., Type 3 - 6 pcs., Clusters of type 3 - 3 pcs. Are permissible.

Values ​​for all class 2 monitors.

All of the above does not mean that you will necessarily come across a display with dead pixels. Often, displays either contain 1-2 defective pixels, or none at all.

Only if the number of defective pixels of each type on the corresponding TFT display is greater than that indicated in each corresponding cell, the product is considered defective and is subject to warranty service.

Having ordered a TV online and gone to the store to receive the goods, the consumer often forgets about checking the TV for dead pixels, as a result of which he risks being disappointed in the newly purchased item when he comes home.

Since the absence of defects in the liquid crystal matrix is ​​guaranteed only by manufacturers of premium models of displays, an ordinary user has to be careful and check the screen before buying on his own.

Pixels are the units of the LCD screen matrix that create any image. The main property of a pixel is its ability to change color: electricity, the amount of which is regulated by a transistor hidden in the TV, makes the microelements of liquid crystals change their position.

Due to the permutation of the red, green and blue subpixels and the intensity of the backlight at a certain point on the monitor, one or another color is formed - if a TV device has 4K resolution and displays content at 30 FPS, more than 250 million such "castling" can occur per second.

Dead pixels on a TV are tiny display elements that do not change color under any circumstances.

Although this defect is practically invisible to the human eye during dynamic cinematic scenes, the user may experience discomfort when viewing static images: the "broken" dots stand out clearly against the general background and interfere with the concentration on the displayed TV picture.

Allowable number of dead pixels

Each TV manufacturer declares the permissible level of dead pixels in the matrix - products, during the pre-sale check of which the number of defects exceeding the established limit was revealed, should be considered defective.

Top companies such as Samsung and LG allow no more than two completely extinguished pixels and no more than 5 incorrectly functioning subpixels per one million points: for example, the already mentioned 4K resolution consists of 8 million matrix units (3840x2160) and, therefore, may include up to 16 defective pixels and up to 40 "stuck" subpixels.

Since the pixels that work properly during factory tests can fail already during the operation of the TV, the manufacturer is obliged to give a guarantee of the full performance of the matrix during the period regulated by international or domestic requirements.

If there are "extra" dead pixels on the TV display, the user has the right to free repair or replacement of the device.

Interestingly, the generally accepted ISO 13406-2 standard limits a company's liability to one year, and LG's Zero Bright Dot program to three.

Reasons for the appearance

The reason for the appearance of broken dots on the matrix of a color TV can be:

• overheating or hypothermia of the device. As a result of exposure to high or low temperatures, the subpixels harden and lose the ability to move inside the liquid crystals;
• humidity of the environment. Excessive humidity is dangerous for the LCD substrate: when moisture gets on the matrix, illuminated areas or white dots of the display are formed;
• power surges. A failure in the electrical network can lead to the failure of the transistor, as a result of which the energy supplied to the RGB matrix will force the subpixels to take a fixed position;
• violation of production technology. It should be said that in most cases, factory defects are caused by only three factors presented above - during the production of the matrix, repeated procedures of washing, drying and lithography are carried out, the slightest non-observance of the technological processes of which leads to the defectiveness of the final product;
• using a monitor to display static content. If the same picture is displayed for a long time, the display transistor may burn out, and the crystals may "freeze". Even TVs supporting HDR technology (10-bit and Dolby Vision) are not immune from this problem.

Also, the matrix can be damaged during careless transportation of the TV-set to the point of sale: despite the firm fixation in the substrate, liquid crystals are very sensitive to sharp mechanical shocks.

How to check your TV for dead pixels

To see the broken elements of the TV matrix, it is recommended to use a special gallery of monochrome images - there are no programs compatible with Smart-TV for checking the display.

The screen testing algorithm is presented using the example of finding white dots:

1. Loading a special collection of images onto a flash drive.
2. Connecting a removable disk to a TV via a USB interface.
3. Opening a monochromatic picture on the TV (in this case, black).
4. Display inspection: white broken elements should be clearly visible against a dark background.

To find black dead pixels, you will need to use a light image, and to detect RGB defects - any background contrasting with the desired bug.

Unfortunately, the user needs to rely only on his own visual acuity, since it is impossible to automate the described process.

External inspection upon purchase

Some resellers provide a paid service for checking the liquid crystal display for dead pixels: the user selects the TV, and the sales assistant tests the display using images uploaded to the device.

It is worth saying that paying for such a service only makes sense if you need to check a 4K monitor, the defective pixels of which are almost invisible against the background of millions of working units.

Warranty case

The service center has no right to refuse the consumer to exchange a defective TV set for a new one only if the manufacturer violates the ISO 13406-2 regulation.

The standard describes the permissible number of broken elements of the display matrix for a particular class of device:

You can find out the display class from the technical documentation supplied with the TV. The following will tell you what to do if you receive a refusal from the service center.

Treatment of dead pixels on TV

Treatment of a color TV (for example, made by Samsung) from broken matrix elements at home is as follows:

• launch of a special video. You will need to download a video clip "warming up" the matrix to a USB flash drive and turn on this video on the TV for 40-50 minutes;
• "Massage" of inoperative units. It is necessary to put pressure on the broken pixels using a regular cotton swab - here it is important to understand that with excessive pressure on the matrix final result may be the opposite of what you want.

It should be said that in this way, dead pixels are eliminated on any digital technology.

Outcome

Now you know what dead pixels are and how to check for their presence in the matrix of a new TV yourself.

It is important that the consumer has the right to free service only after recognizing that the device does not comply with the declared ISO 13406-2.

The question is the following - how many dead pixels are allowed in your monitors. I ask it because your technical support (8-800-555-55-55), the ISO-13406-2 standard and your authorized service centers for some reason cannot agree. Let's start with the fact that in the FAQ on TFT monitors, the following is written: The permissible number of defective pixels is indicated on the last pages of the user manual. Open the last page and read: This LCD-monitor meets the requirements for the number of non-working pixels ISO13406-2 Pixel fault Class II. This monitor complies with Class II according to ISO13406-2 (official normative document), which is officially declared in the instructions. Open the ISO13406-2 standard and read: The maximum number of defects per million pixels: Class ___ Type 1 ___ Type 2 ___ Type 3I ________ 0 _______ 0 _______ 0II _______ 2 _______ 2 _______ 5III _______ 5 _______ 15 ______ 50IV _______ 50 ______ 150 _____ that for a 19 "monitor (1280 x 1024 = 1 310 720 pixels), 2 broken burning, or 2 broken not burning, or 5 broken subpixels (red green blue) are allowed. So why then your consultants call the number 7, and ask me does not suit, and the authorized service centers just carry all sorts of nonsense - 6, 10, etc., and accuse that I was taking their time. Please explain this situation. Thank you. PS I did not find the original ISO 13406-2 text. from a search engine, backed up by a dozen more similar ones and nowhere did I find a figure other than 2. If I have some outdated information, and the standard has already been changed, please post a link to the current document.

Keywords: how many dead pixels are allowed on a samsung TV, the permissible number of pixels on TV by ico, the permissible number of dead pixels on a samsung TV,

13 answers to the question "Question about dead pixels"

The number of permissible dead pixels on a particular LCD display (this applies to both monitors and TVs, and displays built into laptops and tablets) is determined by two families of standards ISO-9241-3XX and ISO 13406-2

ISO-9241-3XX

The standard defines 4 quality classes for monitors. Class 0, the highest, eliminates defective pixels. From class 1 to class 3, the number of permissible defective pixels increases.

The following types of defects are distinguished:

• 1) Constantly burning pixels.
• 2) Permanently extinguished pixels.
• 3) Subpixels (including dual subpixels) displaying a darker or brighter color than necessary (hereinafter simply "light or dark subpixels")
• 4) Constantly lit or constantly extinguished subpixels. The lower the number in the table means the maximum allowed number of constantly lit subpixels.
Specific values ​​are given below, the simultaneous presence of defects of different types is allowed if for each type of defects their number does not exceed the permissible limit for a given class of matrix. The number of defects allowed in the table is per million pixels. For example, for a 1920x1080 matrix, multiply all the numbers in the table by 2.

Class	Number of type 1 defects	Number of type 2 defects	Number of defects of type 3	Number of defects of type 4
0	0	0	0	0
1	1	1	2	3 - 5
2	2	2	5 - 10
3	5	15	50

ISO 13406-2

The standard distinguishes between 4 quality classes of LCD displays, for each of which a certain number of non-working pixels out of a million is allowed:
• Class 1: 0 pixels per million defective.
• Class 2: up to 2 types 1 and 2 defects or up to 5 type 3 defects per million.
• Class 3: up to 5 type 1 defective pixels; up to 15 - type 2; up to 50 subpixels defective per million.
• Class 4: up to 150 ppm ppm.
The standard defines 4 types of defective pixels:
• Type 1: Constantly Burning Pixels.
• Type 2: permanently off pixels.
• Type 3: Pixels with other defects, including defects in subpixels (the RGB cells that make up a pixel), i.e. constantly lit red, green or blue subpixels.
• Type 4 (defective pixel group): several defective pixels in a 5 x 5 pixel square.

Despite the fact that the production of LCD panels does not stand still and becomes more and more perfect, and checking an LCD TV for dead pixels is relevant to this day. At one time, I already had a negative experience of purchasing a liquid crystal display with a broken pixel, although it was installed in a camera, and not in a TV, but this generally does not change the essence of the problem. At that, already distant time, I was too gullible when choosing digital devices and often relied on the advice and recommendations of sales consultants. But in vain ...

This is how I once bought a digital camera and returned home with boundless joy from the purchase, and in the process of shooting I found a red dot on the display, which was visible only against a black background. Yes, dear reader, this is how a broken pixel showed itself. I will not waste your precious time and describe how I managed to solve this problem.

I can only say that the girl (sales assistant) knew about this defect and deliberately demonstrated the quality of the shooting to me by aiming the lens at the goods standing against a light background ... Fortunately, I managed to return it to the store with a fight and take my money. Since then I have learned a lot and now I rely only on my knowledge and strength. Of course, there are honest and competent sales consultants, but unfortunately the overwhelming majority of them think only about how to "shoe" the buyer or how to shove some product, and not about how to develop professionally and be really useful to the consumer.

After all, sometimes it is very problematic to get high-quality advice from them, they carry some kind of nonsense, considering you a fool ... And the managers are very negligent about this and do not think that the sales assistant is the face of the company and whether it depends on its quality of service whether it will return the buyer to their store or bypass it the tenth way.

In one of my publications, I already wrote about (in detail about how 3D works on TVs) and how to choose the right model for yourself with the necessary functions. And now, at the request of the blog readers, I will tell you how to check an LCD TV for dead pixels. I think I need to first briefly tell you what pixels are, so that you have an overall picture of how an LCD panel works.

I want to make a reservation right away that the information I have provided about LCD technology will be of a general informational nature, because, firstly, in this publication we do not consider the creation of liquid crystal displays, and secondly, in order to convey to you all the subtleties of the production of LCD panels, you need to write a separate one article.

What is a pixel on a TV?

The creation of an LCD panel is a very complex process and there are many technologies for reproducing information based on liquid crystals. Liquid crystal displays are used in almost all digital devices (computers, televisions, cameras, telephones, navigators ...) and today life is already unthinkable without them. All these digital devices with LCD technology have firmly entered our lives, and with them the problem of paramount importance - dead pixels - has entered.

LCD technology is based on liquid crystals through which light is passed to produce an image. Most often, the outer layers of the LCD panel are made of glass, and between them and the polarizing filters are placed a thin-film transistor, a color filter panel, a layer of liquid crystals with a typical backlight module inside (back, side ...). During TV operation, light passes through a layer of liquid crystals and the viewer sees an image of pixels painted in different colors.




Each pixel is made up of three subpixels (red, green and blue), which the LCD can distinguish between millions of colors and tints. Molecules of liquid crystals behave like molecules of a liquid substance, being constantly in motion, but as befits crystals, their orientation remains unchanged. The orientation changes only under the influence of an electric field.

PixelIs the smallest element of a digital image or a matrix of displays, which is an indivisible rectangular or circular object and forms an image on the screen.

As soon as this condition begins to be met, the substance in the form of liquid crystals begins to change orientation, up to a selective change in the subpixel. Crystals here act as optical lenses that change the polarization of light waves. This is how every pixel in a liquid crystal panel works.

The reasons for the appearance of dead pixels.

In modern TVs, as a rule, an active matrix is ​​used, and the number of pixels in liquid crystal displays is simply enormous and it is simply impossible to guarantee the serviceability of each of them. In order for a broken pixel to appear on the TV, it is enough for the control transistor to fail or the sub-pixel is stuck in one position.

In the first case, it will not be possible to restore black dead pixels (an inoperative transistor) on our own, without the appropriate skills and equipment. I read once that in the factory, you can simply burn out a damaged transistor using a laser. Of course, such a pixel will not be able to return to a working state, but it will be less noticeable to human eyes. I don’t know how true this is ... Perhaps there is another more affordable solution for recovering this type of dead pixel, but I think that such a defective pixel is not "cured". This type of dead pixel appears as a black point and will be especially visible on a screen with white and light backgrounds.




In the second case, the dead pixel defect can be eliminated by software or by physical manipulation at home. This dead pixel defect is called a “stuck pixel” and appears as a point of light or color on the screen. And this is caused by the fact that the subpixel is stuck in one of the positions and glows in one color on the display. I will tell you how to remove such broken pixels further. By the way, sometimes the broken pixels that appear can disappear on their own after a while.

The reasons for the appearance of dead pixels can be both a manufacturing defect and imperfect technology. Yes, dear reader, nothing is perfect in this world. It must be said that there are standards regulating the number of permissible matrix defects (dead pixels) in the presence of which a digital device will not be recognized as a marriage. So you cannot return it to the store under warranty or as a marriage. Therefore, be sure to test your TV for dead pixels when purchasing.

Number of dead pixels allowed.

The permissible number of dead pixels on the liquid crystal matrix is ​​determined using a special specification ISO 13406-2 (in Russia - GOST R 52324-2005). It should be said that this document contains about 150 pages and regulates not only defective pixels, but also defines a number of other requirements such as the degree of reflection, the level of brightness and contrast, readability of the text, fill factor, uniformity of backlighting and color fills, flicker and glare ...

Nowadays, all eminent brands and manufacturers adhere to the ISO 13406-2 standard, because creating a liquid crystal matrix is ​​a very expensive and time-consuming process, and it is possible to test the assembled panel for defective pixels only after complete production. In this regard, manufacturers try to reject such products as rarely as possible, referring them after the test to one of four quality classes. The ISO 13406-2 specification itself defines four classes (class I, class II, class III or class IV).

The number of dead pixels per million is ISO 13406-2.

• 1st class: does not allow pixel defects (expensive and rather rare models on our market, and if there is at least one dead pixel, you are entitled to a warranty replacement of the LCD panel).
• 2nd class: allows the presence of 2 defects of types 1 and 2, as well as 5 defects of type 3 (the most common class of LCD panels in our market).
• 3rd class: 5 defects of the 1st type are allowed, 15 - of the 2nd type and 50 - of the 3rd type.
• 4th class: 50, 150 and 500 defects of types 1, 2 and 3, respectively, are allowed. (there are practically no such products among mass production).

Types of dead pixels.

• Type 1 - white pixel on a black background;
• Type 2 - black pixel on a white background;
• Type 3 - colored (red, blue, green). This is usually a subpixel problem.

To make it clearer for you, I compared the defective pixels in the table.




By the way, the product class directly affects its cost. For example, a smartphone from one manufacturer costs 800 €, while a smartphone superior in all respects from another manufacturer may cost a third less.

How to check your TV for dead pixels.

In one of the publications, I already wrote about how to check the monitor for dead pixels using well-proven programs. Actually, the test for dead pixels on a TV is practically no different and it can be done using the same programs or through a specialized online service on the network (read how to connect Smart TV to the Internet via Wi-Fi, but using a LAN cable). To check the TV through the programs, it will need to be connected to the system unit or laptop. But what if we buy a TV with an LCD panel in a store, but we don't have a computer at hand.

Of course, there are stores that provide a paid service for checking the TV matrix for dead pixels. But why pay when you can do the test yourself. In order to check the TV for the presence of dead pixels in it, you need to display one-color background images on the screen one by one. For example, to find a black point, you need to display a white background on the TV screen, and to find a white point, you need to display a black background. This is how they look for broken pixels.




So, in order to independently perform a test for dead pixels on a TV, you need to write a set of images with color fills and gradients to a USB flash drive (how to choose a reliable USB flash drive, and on what principle they work). I also recommend writing a set of test videos to a USB flash drive, which will help you not only carry out the test, but also evaluate the sound quality and the capabilities of the built-in player.

You can download images for testing the TV for dead pixels 1080P (with FullHD resolution 1920x1080) and 720P (with HDReady resolution 1366x768) at the link below. The archive contains two sets that need to be extracted from the archive and written to a USB flash drive.

You can download videos for testing a TV for dead pixels at the link below. The archive contains two videos for testing TVs with FullHD (1920 × 1080) and HDReady (1280 × 720) resolution. The clips contain a set of images of different colors and gradients, which will be sequentially displayed on the TV screen with music, which will make it possible to simultaneously check the operation of the speaker system.

So, now you are fully armed and you can safely go to the store for the coveted purchase in the form of a TV. Perform the test without haste and carefully examine all parts of the screen, and if there is actually a defective pixel, then you will definitely see it. It should be said that it is difficult to notice "dead" and "dependent" pixels. The so-called “dead” pixels are not visible on all color fills, and “dependent” pixels can only be detected on moire (checkerboard and grid fills). Also, with the help of these kits, you can check the monitor, but it is better to use special programs such as Nokia Monitor Test (how to check the monitor for dead pixels).

Recovery of dead pixels on the TV.

Nothing in this world is perfect and any digital technology can fail, and the liquid crystal panel can over time upset the owner with the presence of dead pixels. What to do in this case? I think you understand that defective pixels that were formed as a result of the failure of a thin-film transistor cannot be restored on their own. But you can bring the so-called "stuck pixels" back to life. You can try to "treat" the broken pixels by software or mechanical means. But not one of them gives a 100% positive result.

Software treatment for dead pixels.

The first step is to try to bring the stuck pixel back to life programmatically. Using specialized programs is safer than physical treatment. I know about two of the most efficient and actually working utilities. These are Bad Crystal and JScreenFix. Both of these programs are paid, but the cost of the issue is not high.




If you are not sure that the Bad Crystal program will help you, then the developer's site has a test to assess the chances of recovering dead pixels. The site also has a section with frequently asked questions and reports on testing the utility, as well as technical support. This is a very decent and functional program that supports Plasma, LCD, LED, OLED and 3D screens, increases the lifespan, restores up to 90% of defects, removes a frozen pixel in 10 minutes (in some cases, the process can take about 48 hours) and has a simple and an intuitive interface.



The JScreenFix program is also very popular, which, according to the developers, helps not only to find dead pixels, but also in 80% of cases it manages to recover them. The program will guide you step by step until the complete restoration of defective pixels. The utility performs high-speed color switching for each pixel, which allows you to bring the stuck pixel back to work.

The developers claim that the program is able to return everything to square one within 20-30 minutes, and in more severe cases, they recommend leaving the program in operation for 8-10 hours. If there is no positive result, they recommend repeating the process. It also reduces screen burn-in and improves display quality.

Physical treatment of dead pixels.

If the software failed to restore the defective pixels, then you need to massage the TV / monitor. Take a match and wrap a cotton swab on it (you can use an ear stick), turn off the TV and start a slow and gentle massage in the area of ​​the dead pixel. Do not press hard, but perform circular movements with feeling. Thus, by massaging the area with a stuck pixel, you can restore it to the desired position and it will begin to function correctly. Repeat the procedure if necessary.

Just do not overdo it and do not massage the panel with your fingers, and even more so do not touch it with sharp objects, otherwise you will add a dozen more dead pixels to the matrix. I must say that this type of dead pixel recovery is not safe and you do all the manipulations at your own peril and risk.

On this I will finish the article. I hope the prepared material was useful for you and easy to understand. If you have something to supplement the publication or want to express your opinion, then you are welcome in the comments. Till!

2019-03-03T22: 42: 44 + 00: 00

Unfortunately, we do not have psychic abilities and therefore we cannot say how long your TV will live. Most likely, the appearance of dark spots on the screen indicates the presence of damaged pixels. So or not, they will answer you at the service center, since they will be able to perform detailed diagnostics and identify the cause that led to the appearance of dark spots. If the service center confirms that the matrix is ​​really damaged, then the expediency of the repair will most likely have to be questioned, because the replacement price, plus or minus, will be comparable to buying a new TV. P.S. By the way, such spots could appear as a result of mechanical or high temperature exposure. If such stains are found after purchase, return it to the seller under warranty.

2019-03-03T17: 14: 14 + 00: 00

Good afternoon, not so long ago I noticed that on a TV (samsung series UE48 ....) dark spots are visible on a light background, as far as I understand the backlight diodes or a burnt-out matrix in the places where the diodes are located, if you focus your gaze, you can see (grid ) vertical and horizontal lines for the placement of backlight diodes, in general, dark spots. Tell me what this means? How long will TV set live and how is it treated?

2018-08-26T18: 31: 45 + 00: 00

Could you attach photos to a comment to try to evaluate it visually.

2018-08-26T16: 54: 15 + 00: 00

Can you please tell me, I recently purchased a TV and with certain colors, usually blue / blue, in those places where these colors predominate, a contour of green dots appears, there is no contour on other colors of the contour, I could not characterize this problem as broken pixels, this is something other. These green points are chaotic and not tied to a place, they are tied only to the area where certain colors prevail.

2018-06-17T19: 55: 36 + 00: 00

I got money back in yulmart for 1 broken pixel, no questions asked. When I was connected, they saw, they even wrote for me to apply for a refund for me. If the packaging is intact and there are no defects, the aircraft can be returned within 10 working days. Putin signed this amendment to the RFP law a long time ago, stating that any product, including those previously related to a complex technique, can be returned by the buyer, regardless of the method of purchase, that is, in a store or via the Internet. And all the brave and semi-literate leaders or sellers, we are waiting for buyers in court) Only the amount after the trial will be different)))

2017-07-29T13: 20: 48 + 00: 00

Thank you very much for the information)))

2017-02-15T18: 51: 52 + 00: 00

Hello. Tired of choosing. Maybe you can advise. LG 55UH850V TV and Samsung UE55KU6000U TV. Should you pay extra for this LG? Two criteria are important - image quality / price. 3d is not important. And the difference in price is 30 thousand.

2017-01-31T20: 01: 25 + 00: 00

Good evening. Article class. Thank you. I want to buy a TV set for 110 thousand rubles, but I don’t know what class it belongs to, 2 or 3? The first I think is unlikely. There probably a TV set should cost over 150K.

2016-09-13T20: 52: 59 + 00: 00

Unfortunately, I have no constructive answer. However, if you are no longer happy with the purchase, then try to return it. If you do not do this, then in the future you will most likely regret your choice. Good luck!

2016-09-13T20: 48: 11 + 00: 00

Thanks for the answer. But I am tormented by the question - is such a transition in gray shades (from brown through green to gray) considered normal (acceptable) in such displays?

2016-09-13T20: 40: 35 + 00: 00

If two weeks have not passed since the date of purchase, then you can legally return the device under any pretext, if the presentation of the smartphone and packaging is preserved. P.S. There is a permissible number of dead pixels so that the device is not considered a marriage. To return or not, you decide. Good luck!

2016-09-13T20: 36: 31 + 00: 00

Thank you. Good article. I checked the smartphone FWVGA 854 x 480, TFT LCD, 4.5 ", 24 bit, instead of dark gray shades, green and brown colors are displayed, instead of light gray, a solid color is flooded. Please tell me, is this normal or return it back to the store? shop how to describe it?

2016-09-12T23: 55: 29 + 00: 00

2016-09-12T23: 18: 11 + 00: 00

Hello. Tell me please, is it possible to check the screen of a smartphone 854 x 480, 4.5 "with this video?

2016-06-08T17: 00: 05 + 00: 00

VERY HELPED. CHECKED MY TV AND MONITOR. ON THE TELIKA EXCELLENT. AND ON THE MONITOR I FOUND 4 BIT PIXELS ... SEEN ON A BLUE BACKGROUND AND RED.

2016-04-04T15: 38: 07 + 00: 00

You can use NTFS.

2016-03-31T17: 51: 41 + 00: 00

Good afternoon. In what format should I format a USB flash drive for pixel check?

2016-03-07T11: 03: 23 + 00: 00

Thanks, the article helped

2016-01-17T21: 54: 12 + 00: 00

Hello! Is it possible to re-fill the pictures to find dead pixels? You cannot download them from Yandex ... I downloaded the video, checked the TV. I knew that there was one broken pixel and where it was .. But I could hardly find it anyway))) I’m afraid if I didn’t know where, I wouldn’t find it, well, or it takes a lot of time ... Visible on black, blue and barely on green. Not visible on red and light tones ... Thanks for the video, if you can refill the pictures

2015-04-21T01: 43: 39 + 00: 00

I recently bought an LCD TV, model: Sony KDL-55W828B, a few days later I noticed white dots numbering 10 - 15 pieces, they appear from time to time, but often enough and they appear mainly when watching the movie "Once Upon a Time in Rostov", I don't know why. in this film. When watching other channels, everything seems to be normal. I downloaded a test with different backgrounds, the result is, I do not see a single white point, everything seems to be perfect, but in the film, I see them clearly, one at a time, and even in a pair and three cells at a time. To be honest, I'm at a loss. Any advice? I will be grateful!

2015-04-15T14: 06: 22 + 00: 00

Good advice! There was a strip in the middle of the screen, rubbed a little with a cotton swab, it disappeared. I thought the master's bullshit should be called, but I decided to try it.

2014-12-08T16: 30: 18 + 00: 00

Oleg: Now everything is clear. I wonder how the speck on the inside of the glass ended up? :) Since from such a distance the point (or whatever you have there) is no longer visible, then ... You know better: "Let it be" :) Good luck!

2014-12-08T16: 13: 35 + 00: 00

Dmitry: noticeably in all colors except black :) It looks as if the rubber sheet of pixels was pulled back a little beyond this point. There may be a speck on the inside of the glass. It does not cause discomfort, since it is visible from a distance of ≲ 30 cm. Let it be. Thank you.

2014-12-08T14: 17: 37 + 00: 00

Oleg: Most likely, this is still a defective pixel, but I'm not sure. Should I be afraid of this? If this does not cause discomfort to you, then there is no need to be afraid. Is there a noticeable speck on all colors or on some specific ones?

2014-12-08T13: 54: 23 + 00: 00

Dmitry: one. There were two, I rubbed one, it turned out to be a speck of dust. Ter-ter, does not go away. But it is noticeable only if you know where it is and look closely.

2014-12-05T16: 10: 26 + 00: 00

Oleg: I quote: "Darker than the rest on a black background" And how many of them do you have on the screen?

2014-12-05T15: 30: 53 + 00: 00

Pictures in JPEG are compressed with loss of information. There is a bunch of colored noise around the one pixel thick text. I got scared when I saw him on TV. I will make clean pictures based on yours. I have a question about broken pixels: there is a speck on the TV that is darker than the others on a non-black background, it is noticeable close up, in terms of size and location it does not seem to fall into the outlines of the pixel (a little smaller, its borders are blurred). What could it be? Is this something to be afraid of?

2014-11-10T23: 23: 47 + 00: 00

Dmitry: I will assume that the question was about "Demo mode" or "Store" mode and should not affect the check with dead pixels. The other day I want to buy a smart TV 47-50 inches with a price of up to 50 thousand rubles, personally, such a defect would plunge me into horror!

2014-11-03T13: 04: 23 + 00: 00

Pavel: These images are not for adjustment, but for a dead pixel test and nothing more. Understand correctly. Questions should be asked on the topic of the article. After you, the comments will be read by people who came to receive information on the broken pixels.

2014-11-02T16: 08: 57 + 00: 00

Clearly, this is not about my TV ... there are also different test pictures, so I thought that somehow they could help set it up correctly ... Everything is already in the past, I set it up a long time ago, and everything suits me. Good luck to all!

2014-11-02T13: 31: 11 + 00: 00

2014-11-02T13: 22: 38 + 00: 00

Pavel: Dmitry, thanks for the article! With broken pixels, everything seems to be clear, they should be immediately visible, if of course they are ... but how to make the correct settings that reveal all the capabilities of the TV (sony 55w955b), using color and multi-colored pictures, I do not understand. If it's not difficult, please tell me. I would really appreciate it, thank you!

2014-08-24T10: 33: 09 + 00: 00

Dmitry thanks for the article! With broken pixels, everything seems to be clear, they should be immediately visible, if of course they are ... but how to make the correct settings that reveal all the capabilities of the TV (sony 55w955b), using color and multi-colored pictures, I do not understand. If it's not difficult, please tell me. I would really appreciate it, thank you!

2014-08-21T17: 23: 43 + 00: 00

Roman: Firstly, I did not call anyone scoundrels in the article. There is no need to lie. Secondly, there is a list of goods for which a return cannot be made ... However, there are footnotes in other articles that the court refers to when making a decision. That is, each case is individual and it is impossible to say 100% that the goods cannot be returned. It all depends on the specific situation. And in your opinion, it turns out that you can shove the equipment to buyers with impunity. Some buyers know how to check equipment for defects, while others do not. Here are some who use it. I stress some. Thirdly, one dead pixel is not a defect in relation to Smart TV (read the article and look at the table). It all depends on the standard and class. The 1st class does not allow the presence of dead pixels at all, but in our country such digital devices are still a rarity. Therefore, while one pixel is not considered a marriage, but no one wants to have such a Smart TV. Unless they buy it at a discount. You first read the article ... Fourth, why write to me the entire 25th article in the comments. My publication is not of a legal nature. It is freely available, go and read. Fifth, I wrote in Russian that there are very competent and honest sellers. Sixth, I do not call in the article to return the product if a broken pixel is found on it, but I urge buyers to be vigilant. For then buying instead of joy can lead to disappointment. Seventh, you are probably the negligent seller who does not take the consumer's side. Sellers who value their customers work according to the principle: "The buyer is always right" and always go to a meeting. I consider this dispute pointless, I am overloaded with work and I have neither the time nor the desire to respond to your comments.

2014-08-21T11: 21: 33 + 00: 00

Why are you not completely throwing off my article? I don't want to argue with you in the least, I just want to explain. You yourself wrote that the salesmen-consultants of the dishonest are still, well, duck, get a return to your karma from me. It was not necessary to write like this in a post. 25th article. End of the 1st article ... "The list of goods that cannot be exchanged on the grounds specified in this article is approved by the Government of the Russian Federation" It turns out that there is a certain list according to which goods cannot be exchanged ... SUBJECT TO RETURN AND EXCHANGE for a similar product ....): Item 2 (for example) - items of personal hygiene Item 6 (for example) - items in contact with food ... not just a frying pan. but also a kettle and even a microwave oven Item 11 - Technically sophisticated household goods One pixel is not a defect, and you will not change your TV set. I'm talking about this. You yourself have placed the table on this page where the number of pixels and the class are indicated. There are two articles on which exchanges / returns are made. Article 18 talks about returns of marriage. That is, if you turned on the TV at home, and there is a strip across the screen. Article 25, which talks about the EXCHANGE of goods without defects. I repeat, 1 pixel is not a defect.

2014-08-21T00: 16: 39 + 00: 00

Novel: The consumer's right to the proper quality of products 1. The seller (manufacturer, executor) is obliged to transfer to the consumer products of proper quality, as well as provide information about these products. 2. The seller (manufacturer, executor), at the request of the consumer, is obliged to provide him with documents confirming the proper quality of the product. The seller is obliged to sell quality goods, and he can only be sure of its quality after a personal check. I know of various cases of returning goods from the practice of other people and even through the courts. Read this article to the end and grasp its essence. In addition to the listed product, it has a continuation. Article 25. Consumer's right to exchange goods of good quality However, the refusal to exchange may follow if there are no exchange conditions stipulated by the Law: the goods were not in use, their presentation and consumer properties were preserved, as well as seals, factory labels, a sales or cash receipt. The consumer can exercise his right to exchange a good-quality product within 14 days, excluding the day of purchase. In case of refusal to exchange and the consumer disagrees with this, he has the right to bring an appropriate claim against the seller in court. In the absence of a similar product on sale at the time the consumer contacts the seller, the consumer has the right, at his option, to unilaterally terminate the contract and demand the return of the amount paid for the product or make an exchange at the first receipt of a similar product on sale. The seller is obliged to inform the consumer about this. In this case, the right to exchange remains within 14 days from the date of receipt of the message by the consumer. It should be emphasized that the choice of a course of action in the absence of a product on sale belongs exclusively to the consumer. In addition, there are still a lot of extracts and footnotes from other articles. P.S. There is no connection to checking the goods and to raising your salary. You can debate this for a long time, but there is no point in it. If you like to buy goods in this way - buy. Your position is clear. I have no time for empty talk. Good luck!

2014-08-20T23: 47: 44 + 00: 00

And further. The buyer has the right to inspect the product. I repeat, THERE IS A RIGHT, and whether he will use this right or not, this does not bother anyone. The law does not state that the Seller is obliged to check the goods. For example, I have the right to demand an increase in wages, but whether I will raise it or not, this does not bother anyone.

2014-08-20T23: 46: 07 + 00: 00

Dmitry: "Within 14 days, the consumer has the right to return the product without any defects, if the packaging and the digital device are still in a marketable condition. Even if I no longer like the color of the digital device." Now read carefully again the 25th article and the list of goods that cannot be exchanged.

2014-08-20T12: 44: 23 + 00: 00

Roman: The consumer pays money and wants to have a high-quality product ... Those who are faced with the return of digital marriage know that sometimes it is not easy to do this, even if the law is on your side. Within 14 days, the consumer has the right to return the product without any defects, if the packaging and the digital device have retained their presentation. Even if I no longer like the color of the digital device. It is clear that this also does not need to be reached, and everything should be within the framework of the mind. However, the consumer is often rejected. You see, there is no reason to go back. And for whom does the law regulate? The consumer is not obliged to stand above the soul of the director in order to return the goods according to the law, but the seller (store) is obliged to follow the letter of the law. The point is not only that you need to be more careful when buying, but also that they must check it themselves before selling it and make sure that there is no marriage. However, not honest sellers are silent about this. Ideally, when everything is fair. As a result, the seller will receive money, and the consumer will receive a quality product. And everyone is happy. Nobody rolls a barrel at anyone, and there is no escape from facts. I’m for everyone to follow the letter of the law. The law is the same for everyone. Good luck!

2014-04-29T15: 49: 54 + 00: 00

I bought a sony and found a broken pixel. The store claims that 7 dead pixels are allowed. If not replaced, it will have to be treated. Article to the article.

2014-03-31T14: 04: 36 + 00: 00

Salam: Working with a cotton swab is very painstaking and requires skill. But anything is possible ... I am very glad that you succeeded. Good luck!

2014-03-31T14: 01: 25 + 00: 00

Thank you very much the article helped a lot, I tried to rub it with a cotton swab at first, but three more pixels appeared and, most importantly, all of the same color - blue, then I used bad crystal, threw some function from the middle and lo and behold !! all pixels disappeared in just a couple of seconds! Now I'm afraid to touch the screen ...