Ubuntu :: Doesn't Boot From CD. Just Stays On Black Screen

I have tried booting from 2 different Ubuntu CD's (10-04-01 and 10-10) and a Fedora CD.All 3 CD's do the same thing, in Ubuntu I just see the first screen (Keyboard/Battery on the bottom with the guy next to it) and then the screen goes black but the lights, that indicate there's a computer connected and transmitting info onto the screen, are still on.

I know the CD's aren't the problem because they work on 2 other computers I have.The CD drive isn't the problem because took it out of a working computer and that booted up fine with the CD's.I've restored BIOS to default settings.I've tried booting with 1 stick of ram at a time but still doesn't boot.I've left the computer on for 3 hours but nothing appeared on the screen and the lights never turned off. It was just a black screen, nothing on it, not even a blinking cursor.I know it's capable of booting up CD's because the Windows XP setup disc boots.