eharmon
Well-known member
I stuffed a known-working (at least, before now) Apple PowerPC PDS card into my Quadra 650 and it doesn't seem to be working. I've done all the usual:
1) There was slight corrosion on the socket and card, I cleaned with isopropyl and hit it with de-oxit and re-seated everything.
2) I checked the voltages on the rails, they're solid at just over 5v and 12v. I haven't checked -12v but I figured it was unlikely the card uses it.
3) I removed the card and checked the system still boots properly without the card -- starts up every time just fine.
4) I removed the other Nubus cards.
5) I visually inspected the board, I don't see any cracked solder joints or damaged components and, as above, it worked fine pretty recently in another board, as far as I know.
6) I checked for heat, VR1 gets warm (but not crazy hot) which seems expected, and the processor itself seems like it's generating a bit of heat (but nothing crazy -- just slightly above ambient temperature).
But no chime at all. I get a speaker pop as the power comes on and the LEDs light up, but it never seems to go beyond that. No boot, no crash, nothing.
Has anyone experienced these symptoms before? No documentation I can find is useful, it's all basically "reseat the card".
1) There was slight corrosion on the socket and card, I cleaned with isopropyl and hit it with de-oxit and re-seated everything.
2) I checked the voltages on the rails, they're solid at just over 5v and 12v. I haven't checked -12v but I figured it was unlikely the card uses it.
3) I removed the card and checked the system still boots properly without the card -- starts up every time just fine.
4) I removed the other Nubus cards.
5) I visually inspected the board, I don't see any cracked solder joints or damaged components and, as above, it worked fine pretty recently in another board, as far as I know.
6) I checked for heat, VR1 gets warm (but not crazy hot) which seems expected, and the processor itself seems like it's generating a bit of heat (but nothing crazy -- just slightly above ambient temperature).
But no chime at all. I get a speaker pop as the power comes on and the LEDs light up, but it never seems to go beyond that. No boot, no crash, nothing.
Has anyone experienced these symptoms before? No documentation I can find is useful, it's all basically "reseat the card".