1. There is a problem with the power connection of the TV set, resulting in a sudden power failure and a black screen. Find out the problems one by one and deal with them accordingly.

2. The TV power indicator is on, which may be that the standby key of the remote controller is pressed wrong.

3. The TV is in standby state, so it displays a black screen. At this time, just press the standby button of the remote controller again to wake up the TV and restore the normal screen display.