When I boot up the computer the post is good and it goes to the american megatrend page and says "enter setup to enter bios and hit F1 for setup" when I hit F1 a underscore blinks for a second and then the screen goes black and stays black. I have tried resetting the cmos and that didn't change anything.
ASUS Sabertooth 990fx
AMD ii phenom x4 970 black edition @ 3.5ghz
4 gigs of ram