When I originally built my PCC, I left the wires poking out of the top of the a/b connector (20 some-odd pins) instead of cutting them off and making it "flush" with the actual connector.
I had issues from day 1 with my PCC just not starting and when I'd remove the a/b and re-insert it, it would suddenly work! And then, in mid-use - possibly 2 hours after booting the computer, it would just suddenly shut-off!
So, I traced it to the fact that the wire that was "sticking out" from the connector was shorting out the PC and shutting it off since a small, metal piece slides over the top of the actual a/b connector!
Bingo, or so I thought. I decided to cut these wires to make them more flush or at *least* shorter so they wouldn't short the board out. But, now when I turn-on the PCC on the unit itself and then press the 'Reset' button on the Apple keyboard to turn on the actual computer, it doesn't do anything.
Oddly enough, when I turn-on the power switch, I hear the "normal" surge sound but pressing the reset button on the keyboard almost makes the PCC sound like a car trying to start it's engine but the car doesn't turn over!
Any ideas?! This is killing me as I *just* got a 6500/300 logic board in the mail.