This situation may be caused by the computer not being able to detect a certain piece of hardware during self-test or getting stuck in detecting a piece of hardware.

1. Keyboard and mouse. The power-on self-test will detect the mouse and keyboard. If a problem occurs, it will cause the self-test interface to be stuck. The solution is to unplug the keyboard and mouse and check whether it passes the self-test. If it passes the self-test, Replace mouse and keyboard.

2. The hard disk and optical drive are most likely the hard disk and the optical drive. For desktop computers, you need to open the case and unplug the power cord of the hard disk and optical drive to see if it passes the self-test. If it passes, further rule out the problem of the hard disk or the data cable. .

3. If none of the above is true, then the most likely problem is that there is a problem with the motherboard bios and it needs to be returned to the factory for repair.