[EMAIL PROTECTED] wrote: > > Hi guys, figured I'd ask you guys for any idea's on a problem I'm having. > Anyway, this pertains to a pair of Quadra 950's which I'm trying to make > usable. It started out that both worked good. I then focused on one of them > to see if I could build it up some (more ram, VRAM, bigger hard drive, ect) > and then it started to exhibit adb problems (pointer not moving on the screen > when mouse was moved but keyboard fine). Then after 2 more restarts all adb > function was dead (no keyboard or mouse response). So I sat with it for a > while and gave up and moved everything over to the second 950. As soon as I > fired it up though, it showed the same results as the first one. > > The first thing that came to my mind was maybe a keyboard/wire problem so I > went and grabbed another (known good) keyboard and mouse but without any > change in the results. Since I couldn't reset the pram via keyboard anymore I > yanked the pram battery out of the second 950 and let it sit unplugged > overnight. When I came back to it the next day I got the same results. I then > yanked the hard drive, restarted, no change. Tried to start up on system > floppy but it wouldn't even read it (spit it right back out) giving me a > floppy icon with an X threw it. So I yanked the floppy drive with no change. > I then pulled the ram 4 chips at a time trying many different combinations > all resulting in no adb response. > > When I fire up either 950, the keyboard (extended) lights flash shortly as > usual but after that fact nothing. Also, if I press the caps lock button a > few times when starting up, it will light the caps lock light and stay on > (pressing caps lock after that point does nothing). All ram was pulled from > working machines (ram from both 950's and 4 sticks from a quadra 700) and all > were paired in sets of 4. I even tried grabbing 4 1meg sticks and trying that > but of course nothing. If I pull all the ram I get the tone of death at > startup which I assume is normal. Anyway, any idea's are welcome and I'll try > them all if need be. Thanks guys. > > Jake > 94 Hybrid Civic HB
I had a similar experience with a Quadra 840 AV a couple of years ago. What had happened was the ADB circuitry (on the mobo) had gone south. Actually, it was a resistor in the ADB circuit that had given up the ghost. If your ADB circuits are fried, then repair is probably beyond the realm of possibility unless you or a friend are good at micro-surgical electronic repairs. Did you also try using a different known-to-be-good keyboard cable??? You didn't mention that. It's quite possible that's the source of your problem, too. Allen ----- -- Quadlist is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Quadlist info: <http://lowendmac.com/lists/quadlist.shtml> The FAQ: <http://macfaq.org/> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/quadlist%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
