| Symptoms |
Cause |
Repair Possible |
Data Recovery |
| Starts and then halts |
Destroyed factory loading tables. |
Yes |
Yes |
| Does not spin up |
Faulty motor control circuit or links to spindle. |
Yes |
Yes |
| Partition management not possible |
Fault table translator damaged. |
Yes |
Yes |
| Knocking noise from head |
Damage in track 0 or in switching microcircuit |
Yes/No |
Yes/No |