|The freezer trick works best with a drive that has bad bearings. If the head/s are not moving then it may be the circuit board. |
As ijack has told you but perhaps you don't understand. You most likely have contaminated the innards with dust particles.
The clearance between the platter and head is so small that a dust particle is like a boulder in scale.
I doubt chilling the drive will work.
A 320GB drive has more clearance than a larger drive but the dust is still an issue.
BTW, there may be another set of heads on the other side of the single platter.
Post the brand and full model number for specifics.
If the platter is two sided and nothing shows then it is more likely the circuit board.