LCD TV backlight failure phenomenon

1. Boot Huaping

In the maintenance, I have also encountered that the lamp tube in the screen is damaged; the screen is blurred after turning on for one hour, and the sound is normal. This phenomenon is that the digital board is not good, and the second is that the connection of the machine is not good.

2. No image and no sound when booting

There is no image and no sound when booting, the power light flashes and turns to be always on, and the screen flashes white light at the moment of booting. This fault is mostly because the backlight driver board is damaged.

3. Boot three no

There are three no power on, the power light does not light. One is that the power board is broken, and the second is that the CPU part is not working properly; the light flashes and cannot be turned on: the CPU bus is not working properly or the boot program IC is bad, and the contact between the BIOSIC and the CPU is poor.