Try zapping the pram, and try zapping it for about 10 chimes.
Might help.
Also the CUDA (?is that the right name?) on the motherboard might need
to be reset.
> > Recently acquired a 7200/90 that doesn't work. All internal
> > cables, connections and cords appear fine, but I get nothing after the
> > startup chime - no video signal, not even a flicker on the monitor.
> > Power supply seems to be powering everything up, but nothing happens.
> > Changed PRAM battery, just in case - nothing. Swapped out logic board -
> > no joy. The unit doesn't even seem to be attempting to find a valid
> > system folder to load: Disk Tools floppy inserted at startup - nothing;
> > System Software CD-ROM and four-finger salute - the same. RAM DIMMs
> > (two 16s from my 8600) are good....in fact, I'm reasonably sure that
> > everything I've installed/tested is OK, but still NOTHING! I'm stumped.
> > Can anybody give me a clue...??
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