Case:
The customer’s hard disk accidentally fell, and then the computer could not be recognized.
Solution:
Use 3K test first, find that the indicator light is often lit, there is a knocking sound in the disk, the magnetic head does not reset and is accompanied by the fixedware and the magnetic head of the tap sound.The chance of the problem is greater, so the magnetic head is opened directly. After the replacement, everything is normal, and the user data is 100%recovered.