Hooked one up to an external USB caddie and managed to smoke it.
(I think the caddie had power supply issues)
Seems to have taken out the voltage regulator on the pcb.... it gets extremely hot.
Anyways, it's a:
Western Digital WD400 (WD Caviar)
Model WD400BB-00DEA0
LBA 78165360
40.0GB
Just need the pcb for parts, don't care if the drive itself works.
There may be other WD drives that would have what I need, so if you have a dead drive around..... please take a gander at the circuit board layout.