With no RAM of any kind it should probably give a no RAM error instead of a no video card error. That is kinda weird.
Oh well, hopefully you can borrow a different set of RAM to test with.
I was able to try it with some different RAM - a 1333 stick. The computer starts up and no longer shuts down, but still won't boot into BIOS screen.
What it now does is start up, emit a beep as it might normally, but there's no video. Inside, it sounds like it's going through the right motions (drives spin up, fans all come on). The CPU load lights come on at first, but after a short time, turn off. The CPU fan turns on initially, then stops, then turns on and stays on. After that, it just sits there with the fans going, not doing anything.
Seems like the RAM may have been a factor; not sure what the problem is now.
thanks in advance