I had a past problem with my computer, and I was pretty sure it was the motherboard. It's a K9A2 Platinum, and I would get no video, and when holding the power button in it would not power off. I tried different pci-e slots, different RAM amounts, modules and slots, tried two video cards and nothing. The psu is a Corsair 520w and puts out 3.4, 4.9 and 12.1 to the rails so it checks out ok.
I just installed the new motherboard and still no video with either card, in dvi, vga, s-video or HDMI. The only upside now is the board powers off after holding in the power button.
Any ideas guys?