Last weekend I had this issue which seems to be a bit common and had no resolution afaik: All things are good, you checked wiring, slots, memory, cpu, etc.. everything is as should but there's no video. Asus guys had RMA'd a bunch of ROG MoBos for A2 code (IDE detect) hanging derived from no video after loading windows.. Seems like there's no easy way to replicate, therefore some RMAs processed.. but there are some expired ones with similar issues that have no clue. Well, it seems that on some Monitors, the DVI auto-select (analog/digital) gets stuck. So, you get all info within the system as ok but video never shows for no apparent reason. All you needed to do was disconnect the power cord from the Monitor for a couple of minutes or better yet, bring another Monitor once everything is ruled out and voila!. Now, IDK about differences between brands and interior clockwork for Monitors but it happened to me on a Samsung brand one. I hope this helps som1 one day.