1, the set-top box works too long, and the poor heat dissipation effect will lead to abnormal video output such as memory overflow of the set-top box software.

Solution: cut off the power supply of the set-top box, let the set-top box cool for a period of time before turning it on.

2. The remote control button leaks electricity.

Solution: Replace a matching remote control.

3. The backlight of TV screen is broken or under other special circumstances.

4. There is a virtual welding fault in the screen drive circuit inside the TV.

5. The circuit controlling the high-voltage board switch on the TV advertising board is burnt out.

Solution: The above 3-5 points need to be dismantled by a professional master for inspection and maintenance. If the TV is still under warranty, it can be sent to the TV brand repair shop for warranty.