Windows 7 - Screen goes black UNTIL windows turns on: Can't get into BIOS

Ok, so...I just got over my BSOD problem by disabling crossfire on my system. It was working fine for a few days (And it still technically is), but I'm having a strange issue now. The computer turns on and loads windows fine, but the screen is black until Windows actually loads. Basically, I don't see a splash screen for the motherboard and there's no way for me to get into the BIOS.

Has anyone experienced this problem before? Any ideas?

System Specs:
Processor: Intel i7 3960x
Motherboard: ASRock Extreme 9 X79 chipset
16 GB of RAM: Corsair Vengeance 1600 Mhz
Graphics: 2 x Radeon 7970's (Both cards are connected, despite Crossfire being disabled)
OS: Windows 7 Ultimate - 64 Bit

Does the motherboard have a built in video port? You could try hooking your monitor to that to get into the BIOS. Then from there.. not sure, maybe the internal video port was enabled by a BIOS reset or something, try turning it off and maybe it'll then use your normal card(s) during POST?

Unfortunately, no. The motherboard doesn't have a built in video port. It basically needs a graphics card to function.