When does the LCD TV need to repair or replace the backlight?

When does the LCD TV need to repair or replace the backlight?

1. The LCD TV is turned on and the screen is blurred.

During maintenance, We have also seen that the lamp in the screen is damaged; when the screen is turned on, the sound is normal. This phenomenon is the bad digital board, and the second is the bad internal connection.

2. There is no image and no sound when the LCD TV is turned on

There is no sound when booting up, the power light flashes once and turns into a constant light, and the screen flashes white light at the moment of booting. This fault is mostly caused by damage to the backlight driver board.

3. The LCD TV is turned on with three nos

There are three failures when booting, and the power light does not turn on. It may be that the power board is broken. The second is that the CPU part is not working properly; the light flashes and it cannot be turned on, the CPU bus is not working properly or the boot program IC is bad, and the contact between BIOSIC and CPU is poor.