No video signal with Gigabyte ga-k8n-sli
I'm running a Gigabyte ga-k8n-PRO sli with a GeForce 7600gs PCI-e card, AMD athlon 64 processor and 1 gig of ddr400 ram (4x256mb). recently I stopped receiving any signal to the monitor that I have. Took it to a shop here and they said the motherboard went bad. So I ordered another ga-k8n-sli (a non Pro) for a replacement and it's doing the same exact thing. I did upgraded to 2 gigs of ram (4x512mb) and a nvidia 9500gt PCI-e 1 gig video card while I was at it. Still not receiving any signal video wise to any kind of monitor (I've tried 3 different ones and even checked out my video cards on a friends computer (they were working). I'm at a complete loss! I can't figure out what my next step would be. Any theories greatly appreciated!