Hi, I recently installed a new 500w power supply, a stick of 1gb ddr2 ram, and a used 8600gt nvidia geforce graphics card about two weeks ago.
My computer has been fine until today - it boots up (there is a single beep after it is turned on) but there is no video. I made sure the dvi cable was secure, but there still seems to be no video.
When I tried to shut it off by holding the power button, nothing happened, except for the processor fan stopping. The only way for me to turn it off was to hit the power switch in the back.
I've tried googling this problem, but I have not found any problems identical to mine, so thanks for the help in advance!