There are several reasons and solutions for the TV to turn on and flash the screen black:
1. Drive the backlight board circuit failure, connect the correct circuit or replace the new backlight board.
2. If the high-pressure plate fails, replace the high-pressure plate fuse.
3. The input pole of the power supply circuit is faulty, and the transformer is replaced.
4. Backlight plate high voltage inverter and control triode air welding, re-welding.
The TV brings a lot of laughter to our time at home, but some friends just turn on the flash and then the black screen, so what is the reason for this? Let's talk in detail about what is the reason for the black screen when the TV is turned on and flashed? How to solve it?
1, it may be that the backlight board of the TV is not lit, and there is a problem with the circuit driving the backlight board. Go to the circuit of the BACKLIGHT board of the TV set correctly, and if it still does not work, you can replace a new backlight board.
2, it may be that the high-voltage plate has failed, and the failure of the high-voltage plate is generally that the insurance is burned or there is a problem with the switch chip. First connect the monitor to the host computer for boot check, when close to the TV screen we can see the faint image on the screen, then we can prove that the display of the TV a/d driver board is normal. At this time, the reason for the black screen of the TV may be that the high-voltage board has failed, replace the fuse of the high-pressure board, and replace the switch chip if it does not work.
3, may be the input stage of the power supply circuit, the voltage of 12v converted to a voltage of 5v, resulting in a screen after the TV is turned on. Replace the transformer so that the voltage of the power supply is not too low and cause the TV to go black.
4, may be the backlight board high voltage inverter and control of the tertiary tube is not empty welded. Find a maintenance master or after-sales service to re-weld the backlight board high-voltage inverter and control three-stage pipe of the TV to prevent the backlight board high-voltage inverter and control the three-stage pipe or air welding.
The pictures in this article are from the Internet