happymacunhappymac
Well-known member
This was a really crappy day. I was trying to install MacSD drives (one hardware device, three "drives") in my Mac II and having nothing but trouble. As I tried to fix the problem, I involved more and more pieces of hardware -- a IIci that had some stuff on it I needed, a 7600, and a G4. I more or less broke everything I touched.
I wish I'd stayed in bed.
A couple days ago, I came across a bad adb curly cord. It caused the command key to be stuck down. There was nothing wrong with the kb. Swapping the cable solved the problem. I set the cord aside.
Tonight, I decided I was tired of moving keyboard and mouse between two computers that I wasn't often using simultaneously, and I grabbed the bad curly cord. I should have thrown it away at the first sign of trouble, but I didn't. I used it on the IIci.
Earlier in the day, I was messing around the ci with the lid off, and I dropped a little screw on the motherboard, just north of the simms. I immediately yanked the power cord out, to minimize damage. Then it rolled around a bit as I tried to pick it up. I don't know how much power was left on the board from capacitance in the power supply.
Just about when I was going to go to bed (a couple hours ago), I shut the ci down. And it turned back on. I shut it down again, and it turned itself back on. I disconnected everything, including the scsi ribbon cable and drive power harness. Then I plugged the power cord back in. Sure enough, it turned on a couple seconds later.
I imagine the new problem is due to the potentially-shorted adb cord or the screw.
It looks like I've got a board-level repair ahead of me.
I wonder if anyone has seen anything like this before.
I'd just say screw it and get another motherboard, except this one was recapped last year and I don't want to just toss that $.
Thanks in advance for any clues/advice.
Edit: I also swapped power supplies - put a known good power supply into the IIci that won't stay shut down. That didn't resolve or change the problem.
I wish I'd stayed in bed.
A couple days ago, I came across a bad adb curly cord. It caused the command key to be stuck down. There was nothing wrong with the kb. Swapping the cable solved the problem. I set the cord aside.
Tonight, I decided I was tired of moving keyboard and mouse between two computers that I wasn't often using simultaneously, and I grabbed the bad curly cord. I should have thrown it away at the first sign of trouble, but I didn't. I used it on the IIci.
Earlier in the day, I was messing around the ci with the lid off, and I dropped a little screw on the motherboard, just north of the simms. I immediately yanked the power cord out, to minimize damage. Then it rolled around a bit as I tried to pick it up. I don't know how much power was left on the board from capacitance in the power supply.
Just about when I was going to go to bed (a couple hours ago), I shut the ci down. And it turned back on. I shut it down again, and it turned itself back on. I disconnected everything, including the scsi ribbon cable and drive power harness. Then I plugged the power cord back in. Sure enough, it turned on a couple seconds later.
I imagine the new problem is due to the potentially-shorted adb cord or the screw.
It looks like I've got a board-level repair ahead of me.
I wonder if anyone has seen anything like this before.
I'd just say screw it and get another motherboard, except this one was recapped last year and I don't want to just toss that $.
Thanks in advance for any clues/advice.
Edit: I also swapped power supplies - put a known good power supply into the IIci that won't stay shut down. That didn't resolve or change the problem.
re-capped last year. Which chip is that, if you don't mind saying? (silk screen legend on board, chip mfr #)
