I just built a computer from scratch a few days ago. It was working fine. The next day when I went to go power up the computer, the fans come on, the power worked, everything was fine, but the only thing that came up on the monitor was the brand name (AOC) and "No Signal". I turned off and on the computer a couple times and finally on the screen it said: "Overclocking Failure! press F1 to enter the BIOS setup. I press save changes and reboot in the BIOS setup, and it goes back to windows and everything's fine. I turned it off again and now I can't Enter the BIOS anymore, it just says "No Signal" again. help!