x56h34 wrote:
The original fan is a 5V fan, hence you can only feed as much as +5V to the same connector. Like with any other electronic device, if you feed too much power than what's originally rated...you know what happens...
It is printed on the fan itself that it's a 5V fan.
On inspection this particular PPC fan has no power rating written on it, however you're right - I should have researched things more thoroughly there: I was extremely tired, and mistook a fan taken off the 68040 for the fan taken from the underside of the PPC heatsink. Anyway, the deed is done, and the lesson learned. I apologise to the Amiga commmunity for this unnecessary - and untimely - death of a PPC board.
Karlos wrote:
Your resistor might be fried, but expect that any delicate parts would be equally fried, even if you cant see it physically.
I'm hoping the fan header may be on a direct track from the motherboard, rather than sharing a circuit with delicate components - surely the risk of a backsurge from a jammed fan would neccessitate this...(he hopes)?
Hmmm.... weird. On testing the identical component on a different bppc I get 1 ohm across it - not much of a resistance!?!.
Same in both directions, so not a diode.
Could be an inductor?
Any ideas?
If DeQuevedo or someone of similar technical acumen is reading please, please PM me to help identify the damaged component.