I'm impatient... Tested some thing a minute ago.

Removed mobo from case and sat it on anti-stat bag. Without any cards in, one of my PS will allow the CPU fan to spin up and stay spun up. The PS I was just using in this same case however will not spin up the fan.

If I put the PCI gfx card in, then neither PS will make the CPU fan spin. I've tried every PCI slot (there are only 3).

The issue right now is definitely the PCI gfx card - the mobo installed in the case wasn't shorted and it spins up fine with my two PCI TV tuner cards installed.

I tested the gfx card in my Shuttle system and it worked fine - system booted while outputting video.

What a hassle. I don't have a car during the day so I can't even go back to the store until the evening - at which point I'm stuck working on this at night again.
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Bruno
Twisted Melon : Fine Mac OS Software