The white screen is caused by normal backlighting and the screen not receiving the signal from the motherboard correctly. This indicates that the high-voltage part is good. The white screen is due to the T-CON board on the upper part of the LCD screen stopping working or working abnormally. Possible faults in the circuit supplying power to the T-CON board of the LCD screen on the driver board (usually 5V, with a few LCD screens using 12V or 3.3V power supply), or poor or damaged characteristics of the main chip and MCU controlled by the display motherboard. There are chips available on the market that have been written into various MCU programs. As long as the original chip on the main control board is removed and replaced with a new chip that has already been programmed, this fault can be solved.
