if I'm right, the part of the power supply bus should be burned down. I just broke one before. I went back to the factory to fix it. Er, wait a minute. the time when we both break down is the same . Did you accidentally make a short connection when measuring the voltage between two pins with a multimeter?

it seems that the arrow in the lower left corner points to the fuse. Take tweezers and make a short connection. If it can start, it will burn here, but nine times out of ten it will not burn, because the red light is on

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I went back to the factory to have it repaired. It seems to be 80 yuan.

good luck