1. If the TV is connected to cable TV or closed-circuit TV, you can directly operate it with the TV remote control, press the menu key to bring up the menu options of the TV, then find the automatic channel search option, press the Enter key to start the automatic channel search, and you can watch TV programs after the channel search.
2. If the TV is connected to the TV set-top box, you need to use the remote control of the set-top box to search for channels. First, switch the TV signal source to video mode to display the picture of the set-top box, then press the menu key of the set-top box remote controller to find the automatic channel search, press the Enter key to start channel search, and then you can watch TV programs after channel search.