(The disadvantage of the hard disk power interface that leads to the welding of the feet is eliminated. The power-on self-check of a computer is relatively smooth, but the system cannot view the hard disk and cannot enter the system. The author initially suspected that the system file was damaged, so I was going to reinstall the system, but check it as usual. The hard disk is not available, so it is concluded that it may be a hard disk hardware problem, such as the hard disk power interface is soldered, and the hard disk power interface is more likely to be soldered.)