Most modern televisions, computer monitors and cameras are made on the basis of matrix screens. They consist of a huge number of identical cells, which are called pixels. It is to these cells that the digital signal is output, which is converted into a specific color image.
Essence of the question
Broken or damaged pixels is the common common denominator for a defect in any electronic digital device that reproduces an image and is designed on the basis of a pixel matrix. This defect looks like a static, unchanging state of the output signal simultaneously on one, two or more pixels. Simply put, as a complete lack of glow in a certain area.
Checking for dead pixels on your monitor is a snap
The internationally accepted ISO 13406-2 standard regulates four quality classes of computer monitors in terms of the maximum number of dead pixels. Firms that sell monitors also define a certain limit, in most cases corresponding to any of the four classes. Computer monitors, the matrix of which contains a number of dead pixels exceeding the standard, are considered defective.
To check the dead pixels of the monitor, you just need to carefully examine its image. In this case, you can try changing the solid black fill to any other shades. If you can distinguish several “points” of a color different from the fill, then there are dead pixels in the matrix of this monitor.
You don't need any special knowledge to check dead pixels on a TV
Television sets with large plasma and LCD screens have long been included in our everyday life. Unfortunately, they can also have defective pixels in their matrix. To check the dead pixels of the TV, you can use special diagnostic programs. They analyze its matrix and inform the owner of the TV about the defects.
If you do not have the opportunity to resort to the help of computer programs, there is only one option. You need to carefully examine the entire area of the screen, carefully peering into every square centimeter. It will be easier to identify defects if at the same time you begin to change transmission channels and monitor changes in the color gamut of the screen. Broken pixels will appear as black, dots that do not change their color.
