The most common cause of matrix failure is its physical damage and the appearance of cracks. Sometimes the matrix can fail even without external influences. In this case, before deciding to replace it, you need to make sure that it is the portions of the TV circuit that are not image forming, which are corrupted.
One way or another, if the matrix needs to be replaced, there are difficulties with buying a new one - manufacturers are extremely reluctant to release spare parts for free access, most often sending limited quantities to service centers. Therefore, there is an opinion that than changing the matrix for 80-90% of the cost of the TV - it is easier to buy a new one. But this is not so.
REFERENCE! You can not limit your searches to one model, but consider interchangeable ones - and the chances will increase, especially if you pay attention to used spare parts from the “disassembly” of televisions. Such interchangeability of matrices will be cheaper.
What is the matrix in the TV responsible for
The matrix forms an image from an electrical signal. This is achieved due to the fact that inside it there are vertical and horizontal paths-conductors. Behind them is a light source, in front of them is a film with colored dots.
In the normal state, the intersection of the tracks does not let light through. When voltage is applied to the vertical and horizontal tracks - at their intersection, light transmission increases, the pixel starts to glow. The light is colored due to the colors on the film. The viewer perceives pixel points separately from a distance, and as an average RGB value, thus, using a combination of three colors of different brightness, you can get millions of shades.
Are the matrices interchangeable on the TV?
Yes, replacement is possible. On a matrix of the same brand - absolutely no problem. But if you can’t find one, it’s possible to use “alternative” ones that are also supplied for the same TV model (roughly speaking, bypassing the manufacturer’s official order), or from another model.
If the matrix is suitable in size, has the same resolution as the failed and the same technology (LED, LCD), then this is the first sign that it may be suitable for replacement.
REFERENCE! There are lists of interchangeability of brands on the Internet, you should search by marking whether the new matrix will work on old equipment. Do not limit yourself only to articles, view discussions on forums - it is a good idea to register for those and ask a question yourself.
In some cases, it may be necessary to upgrade (or replace it with a flashing, universal) scaler. A scaler is a device that “knows” the parameters of the signal required by the matrix, and deploys the video signal to components that are understandable to the screen: the horizontal and vertical coordinates of the pixel + its luminosity. The universal scaler is flashed using a computer, according to the instructions that come with it. The procedure is simple - we write the firmware on a USB flash drive, insert it into the scanner and supply power to the board. Blinking a diode, the scaler is ready to go. Firmware can also be found on the Internet, but, as a rule, basic ones (resolution, power voltage, color depth) are selected.
Modern TVs use LVDS standard cables (they connect the matrix to the scaler), which are usually standardized. Finding a suitable loop is not such a problem as a matrix, but in some cases, checking the datasheet, you will have to re-solder the sequence of its wires.
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