BingoRingo
New member
Hello everyone, I hope someone has a good idea for my little problem...
I recently acquired a Quadra 630 and, unfortunately, it did not come with a CD-ROM drive, so I purchased one on eBay (AppleCD 300i Plus). The SCSI bridge was broken during shipping and I tried to plug it in just in case it still worked, but the computer did not even see the drive.
I noticed that whenever the non-working drive was plugged in the computer, my external ZIP drive wouldn't work (the extension had a red X at boot), but when the CD-ROM was unplugged, it was working.
Since the ZIP drive uses SCSI ID 5 or 6, and the CD-ROM uses 3, I assumed there was an issue with the termination jumper so I removed it from the CD-ROM. Alas, despite my best efforts at fixing the bridge, the CD-ROM never worked, so I unplugged it, and replugged my ZIP drive this morning only to see that it too was not being recognized by the Mac. SCSIProbe sees something at ID 5 but cannot give any details (while it did not see anything at all for the CD-ROM), and reinstalling the Iomega driver and even the system folder did not solve the issue. The computer says no ZIP drive is connected.
I guess there was a short circuit or something coming from the damaged bridge, it is possible that at one point pin 13 touched pin 11 and maybe pin 15 (pin 13 was broken and I tried to solder it back, it could be possible that some solder was under the pins and touched them). Would this make any sense? And if there was one, or some kind of power surge, what exactly could have been damaged on the logic board? I don't know which chip is the SCSI controller (or whatever it is called).
I haven't tried zapping the PRAM since there is no battery on the logic board at the moment.
If anyone has any idea, I'd be glad to hear it! If a chip is damaged if it is surface mounted I'm not sure I could fix it but it may be worth a try. I really needed the ZIP drive to work on this computer, more than the CD-ROM...
Thanks in advance!
I recently acquired a Quadra 630 and, unfortunately, it did not come with a CD-ROM drive, so I purchased one on eBay (AppleCD 300i Plus). The SCSI bridge was broken during shipping and I tried to plug it in just in case it still worked, but the computer did not even see the drive.
I noticed that whenever the non-working drive was plugged in the computer, my external ZIP drive wouldn't work (the extension had a red X at boot), but when the CD-ROM was unplugged, it was working.
Since the ZIP drive uses SCSI ID 5 or 6, and the CD-ROM uses 3, I assumed there was an issue with the termination jumper so I removed it from the CD-ROM. Alas, despite my best efforts at fixing the bridge, the CD-ROM never worked, so I unplugged it, and replugged my ZIP drive this morning only to see that it too was not being recognized by the Mac. SCSIProbe sees something at ID 5 but cannot give any details (while it did not see anything at all for the CD-ROM), and reinstalling the Iomega driver and even the system folder did not solve the issue. The computer says no ZIP drive is connected.
I guess there was a short circuit or something coming from the damaged bridge, it is possible that at one point pin 13 touched pin 11 and maybe pin 15 (pin 13 was broken and I tried to solder it back, it could be possible that some solder was under the pins and touched them). Would this make any sense? And if there was one, or some kind of power surge, what exactly could have been damaged on the logic board? I don't know which chip is the SCSI controller (or whatever it is called).
I haven't tried zapping the PRAM since there is no battery on the logic board at the moment.
If anyone has any idea, I'd be glad to hear it! If a chip is damaged if it is surface mounted I'm not sure I could fix it but it may be worth a try. I really needed the ZIP drive to work on this computer, more than the CD-ROM...
Thanks in advance!
