I work with thoses disc inn alot of OEM computers at work and the main thing that usally breaks on the is the Electronics part.
Don´t happen to have another one lying around?
if you do its just a matter of switching the pcb and copy the things you want off it
If you don´t have another pcb, would could try putting the disk on a separat IDE channel and setting it up there. if it does not detect the disc i would think that the pcb is def.
hmmm, did that make any sence...
-P-