There are solutions for Hisense TV turning off automatically:
1. If there is circuit soldering inside the TV:
You need to find its virtual solder joint, and then use a soldering iron to re-solder it.
2 If it is an X-ray protection circuit:
You need to test the circuit and replace it if there is any abnormality.
3. If the TV has overvoltage protection or overcurrent protection:
If the TV has overvoltage protection or overcurrent protection, you can turn off other electrical appliances and try to turn it on again.