What if the bios doesn't recognize the hard disk?

Sometimes we find that the bios does not recognize the hard disk. What happened? Is it system failure or hard disk damage? What should I do? Let me talk about the solution that bios doesn't recognize hard disk. I hope I can help you!

The solution that the computer can't recognize the hard disk;

First, check whether the master-slave line of the hard disk is set incorrectly. Improper setting of master line and slave line will lead to system identification error.

Try whether the system can boot from the CD-ROM drive. If the CD-ROM drive fails to start the system, it is likely that the motherboard and power supply are faulty.

3 If the system still can't recognize the hard disk, you can use another computer to check the hard disk to confirm whether it is a hard disk failure. If it is a hard disk failure, the hard disk should be replaced or repaired.

The bios can't recognize the solution of hard disk:

In the first case, it is most likely that the data cable is not plugged in properly or there is something wrong with the data cable. Or the power supply problem, the power supply of the hard disk is obtained from the power interface directly provided by the power supply.

The white one is the power interface of traditional IDE hard disk and CD-ROM drive, and the black one is the power interface of SATA hard disk, which ensures that the power supply has enough output.

The second case is that the BIOS settings are incorrect, which leads to hard disk problems (rare).

This kind of problem is generally not the responsibility of the user. Because all motherboards now use the function of automatic detection of hard disk category and brand model, we generally don't replace them. However, some motherboards may have errors in identifying the type of hard disk during operation, which generally leads to the system being unable to boot from the hard disk. In addition, the normal, LBA and large working modes of the hard disk can also be set in the BIOS of the motherboard, which must be set according to the situation of the hard disk, otherwise other errors are likely to occur. This situation is not difficult to solve, as long as it is set correctly according to the BIOS description of the motherboard and the situation of the hard disk itself.

The third situation is that there is a master boot program but the hard disk cannot be started (the old hard disk, or the hard disk of the original system may have similar problems. )

As we all know, the hard disk has a main boot area with a main boot program in it. If there is a problem with the master boot program, it is normal that the system cannot boot from the hard disk. Troubleshooting this fault is not a very complicated matter, just enter the FDISK/MBR command in DOS mode. This is mainly because the FDISK command file itself already contains the main boot program of the hard disk. Since Microsoft has thought of it, why don't we use it? Judging from the current situation, there are still many cases where the system can't boot the system correctly, but the common ones are basically mentioned in this paper.