Mike Chambers
Veteran Member
- Joined
- Sep 2, 2006
- Messages
- 2,621
alright, so that PS/2 Model 80 (8580) i started that other thread about. the day after i got it, i accidentally shorted the 12 volt rail going to the SCSI drives with the ground. i didn't notice right away, but about 5 seconds after turning it on smoke started coming from they were shorted.
i shut it off immediately, and fixed the crossed wires. when i turned it back on, it seemed like i got lucky. it still turned right on and POSTed. but now, ever since that happened, it hasn't been able to use the SCSI drives. it gives errors when probing the drives. it usually turns up SCSI error 0208603U 221I.
I looked it up, and apparently it's failing at the stage where it enumerates the drives and what IDs they're on. I've tried using 3 different known good drives. same thing keeps happening. at first i thought that i might have damaged the SCSI card. the shorted wires actually was the 12 volt line touching the metal housing of a SCSI CD drive that was plugged in so i thought maybe all this voltage was sent through the card from the drive.
so i ordered a new identical SCSI adapter. i got it, installed it, booted.. same error. at this point i figured it must be the motherboard, so i ordered an identical one. i just got it delivered here today, and i've got it installed. i STILL have the same problem, and i've tried using both SCSI cards!
this is getting very very expensive. i think the only thing left that it could be is the power supply, right? that was the last thing i assumed was wrong, because other than the SCSI drive issue the system works just fine. i can boot floppies and everything.
any ideas?? what is the pinout for these PS/2 power supplies?? i'm thinking i should take a voltmeter to this thing and check the levels of the outputs. do they use any voltages that aren't available on a standard AT or ATX power supply? i was thinking that if they don't, i can rig up one to run this PS/2 temporarily to see if it helps before i spend another $40 when a new PSU wouldn't even help.
any ideas?
i shut it off immediately, and fixed the crossed wires. when i turned it back on, it seemed like i got lucky. it still turned right on and POSTed. but now, ever since that happened, it hasn't been able to use the SCSI drives. it gives errors when probing the drives. it usually turns up SCSI error 0208603U 221I.
I looked it up, and apparently it's failing at the stage where it enumerates the drives and what IDs they're on. I've tried using 3 different known good drives. same thing keeps happening. at first i thought that i might have damaged the SCSI card. the shorted wires actually was the 12 volt line touching the metal housing of a SCSI CD drive that was plugged in so i thought maybe all this voltage was sent through the card from the drive.
so i ordered a new identical SCSI adapter. i got it, installed it, booted.. same error. at this point i figured it must be the motherboard, so i ordered an identical one. i just got it delivered here today, and i've got it installed. i STILL have the same problem, and i've tried using both SCSI cards!
this is getting very very expensive. i think the only thing left that it could be is the power supply, right? that was the last thing i assumed was wrong, because other than the SCSI drive issue the system works just fine. i can boot floppies and everything.
any ideas?? what is the pinout for these PS/2 power supplies?? i'm thinking i should take a voltmeter to this thing and check the levels of the outputs. do they use any voltages that aren't available on a standard AT or ATX power supply? i was thinking that if they don't, i can rig up one to run this PS/2 temporarily to see if it helps before i spend another $40 when a new PSU wouldn't even help.
any ideas?