***RECAP***
To recap for those of you just joining us, my PowerMac 8500/120 (224 MB RAM, 2 MB VRAM, System 7.5.5) doesn't give video nor a startup chime. Lights flash and light up as they normally do, my hard drive spins up, my CD-ROM ejects. Key combos don't work (such as Ctrl-Cmd-Power, Cmd-Shift-Opt-Del-0, Opt, Cmd-Opt-O-F, mouse button down) and there's no video nor sound.
The pRAM and NVRAM have apparently been cleared. I've booted with no battery, the old battery and a new battery to the same results. The system has been in various states of plugged-in-ness with the aforementioned battery combos. All cards and DIMM's seated, cables intact. User has cursed repeatedly.
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Yes but did you swing a rubber chicken over you're head while screaming at the top of your lungs.
Try the minimal approach. Unplug the SCSI cables from the motherboard. Connect power to the Motherboard but not the drives. Remove any PCI cards. Reseat the CPU, making sure it is all the way in, the PC Board material should just about touch the edge connector socket on either end. Remove all but one RAM DIMM. Unplug the keyboard and mouse. Connect a known good monitor. Turn on the computer using the front panel button. In this case you are just trying to get video up.
If it works then start adding things back until it stops working. If it doesn't... probably bad news.
Any more tech support, or should I just email Apple (if they'll even think of helping me with a legacy system like this)?
If you can actually get a response and it's not "Did we make that???" then they'll probably tell you to take it to an Apple Certified Repair location. And that will cost you more than it's worth.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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