Also you have lots of nice upgrades on the machine, one or more of which may be flaky - try stripping the 9600 down to the basics just to get it to boot - known working 1 stick RAM, basic video card, boot up off external HD - remove everything else and add one by one until you find the culprit. Also check the CPU card is seated well, and clean the contacts with electronic cleaning solvent (a must for any 68KMacer, I'm not one to promote "one quick fix", but it has saved a few Macs I once thought near dead recently).

JB