I recently got a new computer w/out windows, and before I had the install for it, I decided to look around at the settings. Under something like video options, I was selecting different options and seeing if they had any difference, one of them I selected made my screen not appear when it restarted. I've tried using a different hdmi, no change. The basic video cable, no change. Not sure what to do. I'm using an ASUS M5A78l-M/US83 motherboard.