Case:
The hard disk is used on a Lenovo notebook. During the use of the use of the external force during the use, the motor does not power the motor.
Solution:
This kind of failure is similar to that the magnetic head is stuck and caused the motor to not turn. After detection, the motor chip has an input voltage but no output. The magnetic group chip work is normal.It is likely that there is a problem with the main control and the motor chip.So replacing the circuit board, but found that the magnetic head was really stuck, manually reset the magnetic head, re -power the power, the motor works normally, but knocking on the disk, he had to replace the magnetic head.The final data recovery was successful.