What happened when Shangri-La turned on the TV after checking in?

Now the star-rated hotels are all like this. You enter the room card to open the door, insert the card into the power box, and the power box sends a signal to the room distribution box. The corridor lit up and the TV socket began to supply power. The TV set is specially set to factory mode. As soon as it is turned on, it will start itself and jump to the preset channel (usually the hotel's own program). The volume is generally around 15, which is slightly larger than the background music. If you don't like this, just turn off the mechanical power switch on the TV panel, and the TV won't start itself next time you enter the room. Some TVs don't have a mechanical 220V switch, so unplug the power cord (hahaha). I am a weak electrician in a five-star hotel, and I hope I can help you.