Making my first build from scratch. I've managed to boot to bios just fine with everything except GPU plugged in, but when I plug in my GFX card, suddenly, black screen. I've tried both onboard and GPU dvi ports when the GPU is plugged in, but still no signal. As soon as I take out the GPU and switch to onboard graphics I can get into BIOS.
EDIT: After putting in a different GPU which I know works correctly from my old rig, I discovered that the problem remains. Unless I am mistaken, this means that the problem must be related to the motherboard (or BIOS maybe?). Does it seem possible/likely that the mobo might be DOA so that when a PCI-E device is used, the pc black screens?