OK.. First thing I did was check the outlet and strip..it works fine. I even moved the computer to a different wall outlet that works fine with lamps etc. ..no good.
Fortunately, I do have another MDD G4, which I moved my Pro Tools PCI cards into, as it's my work machine that died, so I had to get back up and running fast.
I could certainly try using the video card from that one, which IS working, and is also the identical model of vid card too.
Not sure if I can...