An external IDE harddrive that I have has recently stopped working quite suddenly, when tried in other computers it is not even recognised by the BIOS or by a Linux recovery disk. I assumed that the fault must be with the PCB, but there is no visible damage to the board.
In my research, the problem seems to be often caused by a fried chip on the PCB but the board looks fine to me. The drive may have made some unusual noises briefly before it died but honestly I can not be sure. One day I turned it on and it just did not spin up and was not recognised.
For your information it is a WD Caviar, model number WD2500BB-22GUCO with board number 2060-701266-001 REV A.
What could cause a drive to no longer recognised by the bios, and what are some fixes I can try? Is it possible that the PCB is still the culprit despite me not being able to see any visibly damaged components?
Many thanks, Ben