Sony TV turns on the black screen, and the automatic detection light flashes twice at intervals. What's wrong?

This kind of fault should be checked from the power supply. First check whether the external power plug is loose, whether the plug is carbon-deposited, and whether the wall socket is loose. No problem. We need to open the box for inspection. If you have no experience, professional maintenance is recommended. If yes, measure whether the power supply is normal and whether the output voltage is normal. There is usually no big problem.