Ok, here's how I fixed this on my machine: I have an onboard gpu but it was disabled from the beginning in the bios. My 6200 graphics card has both a dvi and vga connector. My monitor was plugged into the dvi connector. My monitor supports both dvi and vga. I tried booting with the monitor plugged into the vga port and everything works great. I haven't tried switching back to the dvi connector yet.