Sorry Zodraz...no go.
Did the CUDA reset. Nothing. Tried the following startup disks - all of which should start up this machine in OS 9.2, which is what it was running: TTP 3.0, DiskWarrior and an OS 9 install disk. All of them are spit out shortly after the machine starts up and then when I reinsert them, nothing happens beyond a few seconds of the CDROM drive spinning up and then spinning down.
Tried disconnecting the HD. Same result. Tried different HD. Same result. Hard drive doesn't appear to even spin up.
So, in desperation I put the old ZIF back in (the original 233) and that didn't do anything either. Same old, same old.
Did one final Google search and found this:
http://www.uncleleron.com/mt/archives/000191.htmlHMMM...mouse on this machine is a Logitech USB wireless, so that doesn't seem too probable, but what the hey - the USB/mouse angle is about the only one I haven't tried yet. Much digging through boxes of old stuff ensues - finally emerge with an old square ADB. Whatever - should work.
Pull the keyboard tray out to access the ADB port....and...wait for it...don't start laughing...found the keyboard was
SITTING ON A CONNECTED ADB MOUSE. (son had the feet at the back of the keyboard out, so mouse was wedged underneath) As soon as I moved the keyboard, like magic, the machine began to boot up. ARRRRGGGGHHHH. Another case of a "childrenized" computer!!!!
Well, Sonnet processor is now back in place, extra ADB mouse has been removed and children have been scowled at. Back to our regularly scheduled programming...
Thanks for the input, Zodraz & Kelly. Luckily, the answer was far simpler than we were all imagining!
And no, Pete won't be getting my G4 any time soon...