Well, sounds like a bad controller or something (mobo prob), buuuuuut, I'm just intermediate. I only know about what parts go where lol
So.... since your video card isn't working now either, just send it to me and I will dispose of it for ya! hahahaha j/k
Sounds like a setup prob to me broski. did you check and re-check your connectors and (if any) jumpers? With the keyboard and mouse not working, that sounds like a USB/USB controller thing. That's why I suggested it's possibly a bad mobo :-/ I hope not though! Lettuce know what you find.