hi, I have a strange problem on bootup - maybe the BIOS? I have an M3A 770 w/AMI BIOS. when I boot up I get the splash screen, and at the bottom I get 'press DEL to enter setup, or TAB to show post messages'. Sometimes, out of the blue, when I try one of these I get 'No video input... please check signal'. I let it sit there and it won't do anything, no hard drive movement, nothing. I have to restart. I don't have a clue what this is and why it is doing it... any help appreciated - thanks p.s I don't want to risk flashing the BIOS...specs are in drop-down thing.