Computer diagnosis method based on recording of power-on and power-off of computer board

The invention discloses a computer diagnosis method based on recording power-on and power-off of a computer board, which works in an embedded controller and comprises the following steps: after the embedded controller is powered on, delaying preset time to control a system power supply to be turned on so as to supply power to a CPU (Central Processing Unit) and a peripheral circuit thereof; receiving a first state monitoring signal from the system power supply and a startup feedback signal from the CPU so as to diagnose whether the system power supply and the CPU are normally started or not; after a shutdown request signal from the CPU is received, a corresponding shutdown signal is sent to the system power supply, so that the system power supply stops supplying power to the CPU; receiving a second state monitoring signal from the system power supply, and diagnosing whether the system power supply and the CPU are shut down normally or not; and sending the startup process and the shutdown process recorded by t