I am an idiot and recently turned off the graphics adapter from the device manager. I now have a black screen. I have an ASRock z77 extreme 4 motherboard. I tried to reset the cmos by moving the jumper to 2 & 3 when powered off and then moved it back. It booted the cpu but it is still a black screen. Any help would be appreciated. I saw someone post to fully remove the cmos battery but I dont even see it anywhere.