Samsung TV Dead Pixel
There is no exact data on warranty situations with dead pixels for Samsung TVs. But some situations can be said with certainty.
- A dead pixel in the form of a bright dot of any color on the display can become a warranty case if it is located 4 inches from the edge of the screen.
- A dead pixel in the form of a black dot could be a warranty case on a Samsung TV, depending on its location on the screen. There are cases where 1-2 dots can be a warranty case, but only for some screen diagonals.
In any such case, it is recommended to contact Samsung technical support to clarify the situation. You can find the necessary phone numbers in the user manual that came with the TV, or on the official website.
Tolerances For Dead Pixels
There is an ISO 9241 specification that governs video matrix bit pixel tolerances. ISO 9241-307 specifies four screen quality classes for the acceptable number of dead pixels.
This standard presents four classes of defective pixels per million in LCD panels:
- Class 0 panels are completely defect-free, including no broken pixels or subpixels.
- Class 1 panels allow any or all types of defects:
- 1 permanently lit (“white”) pixel
- 1 permanently off (“black”) pixel
- 2 single bright or dark subpixels
- 3 to 5 “white” or “black” subpixels (depends on the number of each)
- Class 2 panels allow any or all types of defects:
- 2 completely light
- 2 completely dark
- 5 to 10 single or double light or dark subpixels (again, depends on the number of each; no more than 5 brights (“white”) subpixels are allowed).
- Class 3 panels allow any or all kinds of defects:
- 5 completely bright pixels.
- 15 completely dark pixels
- 50 single or double subpixels
Many advanced LCD matrices and TV manufacturers set the tolerance for their products as “completely defect-free”, Class 0.
As you can see, attention to broken pixels in the display has always been paid and this problem was taken seriously. Therefore, these days, even screens with a single broken pixel are considered defective. But not all manufacturers recognize it as a warranty case. And you can change the TV before you buy it in the store. But when is a warranty case? Is the TV already at home? You need to ask about this when you buy a Samsung TV.
Since pixels that work properly in the factory tests can fail while you are using the TV, the manufacturer is obliged to guarantee the full functionality of the matrix for a period regulated by international or internal requirements.
Detailed information on dead pixels on your TV screen.
Samsung TV Pixel Policy
Each company has its policy regarding dead pixels. Many manufacturers determine the number of faulty pixels for a warranty case.
But Samsung considers their displays defect-free and does not have a clear policy on faulty color dots on the screen for warranty exchanges. These conditions change over time, affecting the number of broken subpixels, their location on the screen, a crystal stuck in a cell, or the control circuitry of a particular dot burned out. This affects the company’s warranty policy.
You can still hope for a warranty from the seller, but you need to find out at the stage of buying a Samsung TV.
Why Are There Dead Pixels?
The cause of the appearance of broken pixels on the matrix of a color TV may be:
- overheating or overcooling of the device. High or low temperatures cause sub-pixels to harden and lose their ability to move within the liquid crystals;
- ambient humidity. Increased humidity is dangerous for the LCD substrate: when moisture gets on the matrix, it creates glowing areas or white dots on the display;
- voltage spikes. Malfunction in the electric network can cause transistor failure, as a result of which the energy supplied to the RGB matrix will make sub-pixels take a fixed position;
- violation of production technology. It is worth saying that in most cases factory defects are caused only by the three factors presented above — during production matrixes undergo repeated washing, drying, and lithography procedures, and the slightest non-compliance with technological processes leads to defects in the final product;
- also the matrix can be damaged during the careless transportation of the TV set to the point of sale: despite the strong fixation in the substrate, the liquid crystals are very sensitive to sharp mechanical jolts.