How to repair the black screen of LCD TV without sound

The black screen of LCD TV has sound but no image, which may be caused by the following reasons:

1. Signal source problem: Check whether the signal source is normal, such as TV set-top box and DVD player.

2. TV setting problem: Check whether the TV setting is correct, such as input signal source and resolution.

3. TV backlight problem: Check whether the TV backlight is normal, and replace it if it is damaged.

4. TV motherboard problem: Check whether the TV motherboard is normal. If the motherboard is damaged, it needs to be replaced.

5. TV screen problem: Check whether the TV screen is normal. If the screen is damaged, it needs to be replaced.

Maintenance method:

1. Check whether the signal source is normal. If the signal source is normal, check whether the TV is correct.

2. If the TV is set correctly, but there is still no image, you need to check whether the backlight of the TV is normal. If the backlight is damaged, it needs to be replaced.

3. If the backlight is normal, but there is still no image, you need to check whether the TV motherboard is normal. If the motherboard is damaged, it needs to be replaced.

4. If the motherboard is normal, but there is still no image, you need to check whether the TV screen is normal. If the screen is damaged, it needs to be replaced.

It should be noted that LCD TV maintenance needs professional operation, and it is not recommended to repair it by itself. If you are not sure what the problem is, you'd better contact a professional for maintenance.