This phenomenon indicates that the motherboard failed to enter the self-test program and crashed.

1. There may be a problem with the power supply, and the output current is not enough to drive the various devices of the computer to work.

2. A certain device may have a short circuit. When it is turned on, the current surges and the power supply cannot pay, so it flashes to a halt.

3. There is a problem with the motherboard and the power management module is not working properly.