1. First enter the TV application interface, select and find the system settings, and then open the TV menu. The penultimate thing is to restore the factory settings, and select OK to restore the smart TV to the factory settings. At this time, the TV factory will return to the most basic situation. 2. In another case, when using the remote control, press and hold the setting selection key and the channel plus key above, and then release them after a long press. 3. Find the TV remote control, and hold down the select key and the projection key on the remote control at the same time. Hold it for a few seconds, then release it.

/Related knowledge science:

1. There are many reasons why the TV screen is black. For example, the backlight tube of LCD of TV may be damaged, resulting in the black screen of TV.

2. If the TV image display is incomplete, it may be that the signal board is damaged, and the most serious thing is that the display screen is broken. The display screen is the most important part of TV. It may also be caused by the problem of field amplitude and field linearity of TV set.

3. If it is the problem of TV field amplitude and field linearity, it is necessary to find the problem according to TV model. Bus TV can try to find a way to enter the factory mode, and enter the factory mode to adjust the field amplitude and field linearity options. The old TV needs to be opened to adjust the fine-tuning potentiometer inside. If you have no experience, it is recommended not to do it yourself to avoid danger. You can contact the after-sales or maintenance company.