This started out as a video card problem (resolved, I think). Then gotta different blue screen, restarted computer but no boot; #3 and #4 lights on tower front indicate memory problem so began following instructions to remove each of the four modules one at a time to see if it would boot. Removed the first one, plugged computer back in...NOTHING. No lights, no fan, no nothing. Just a little green light on the motherboard.

It's a Dimension 5100. Does it have a fuse? Or a circuit breaker? Any help?

Thanks...

Braincramp