Hmm... Interesting development.

I decided to fiddle around with the machine again today; I reset the CUDA a few times, and eventually wound up moving the Radeon to slot D2. And... presto! Sorta.

I now get chime and video signal, but the signal is lost within a second or so and my monitor goes back into Standby before it has a chance to actually display anything.

I've only got one stick of RAM in at a time (and I've used several different sticks), the Radeon is the only PCI card, and I've got an XLR8 Carrier in now set to the proper settings. I've also tried three different PRAM batteries, and none of them get me past the signal-flash.

And if I move the Radeon out of D2, I'm back to where I was before; chime, but no video signal whatsoever.

Thoughts?