Computer worked fine at beginning. I installed my power color 7970 along with the driver pack and the 12.11 from AMD's site. Restarted, worked fine (HDMI in mobo). Shut down, plugged HDMI in card, powered up, nothing happened. Reinstalled drivers etc. Still nothing. Go into BIOS, set Initial Display choice from auto to PCI, also set some other stuff to send video to pci/card. Now when I boot, I get no video from either the mobo or the card. How do I fix this?