1. First, the TV set enters the bus mode. You can press the power off button of the remote control to exit the mode, and then it will return to normal.

2. Secondly, it is caused by the switching error of TV signal source. You can press the signal source key of the remote control to pop up the menu options of the signal source, and then switch the signal source modes one by one until the normal TV picture is restored.

3. Finally, you can contact the after-sales service of the TV set, which will arrange professional technicians to come to the door to solve problems for users.