I DO NOT understand this at all. My computer is NOT booting up!

[xcyper33]

I tried to switch out my 8800GT for GTX 560ti and now my computer doesn't turn on. For process of elimination I took out the graphics card to see if that was what is stopping my computer from going in. That wasn't the problem. My Power SW and Reset SW cables came out, I replugged them, but it still doesn't come on. I checked for anything that might have gotten unplugged but it seems as though everything is doing OK. When I plug the cable to my Power Supply my PSU lights up and the mobo light, lights up, but when I hit the switch it just doesn't come on. I DO NOT get this AT ALL. HELP me I'm getting so stressed out PLEASE HELP!

Specs:
ASUS M4A77D
Phenom II X4 955 BE
4GB DDR2

 

[Indigo]

Did you ground yourself before working on the PC? It's slightly possible you may have zapped or zinged something in the process of upgrading.

Did you try the system with the old graphics card? I saw that you removed the new one, but you didn't specify if you put the old one back in.