I've had this problem three times now, enough to know to suspect that it's likely going to happen every time I turn my computer off. The first time it happened my best guess was that Windows was busy installing a plethora of updates that I'd put off and was simply refusing to display anything until it finished. The second time proved that thought wrong and I tried several things to get it to restart to no avail. Now I'm sitting here waiting for the computer to emerge from hibernation while digging through the internet in search of answers.
So what happens is that the computer turns on--fans whirring, components silently clicking, light blinking, monitors powered--and then nothing comes up on screen at all. The monitors themselves function correctly, showing their own startup displays when I reset them, but all they'll give me are no-signal messages. After sitting frustratedly for hours trying to get around the issue and find ways to do my work, the computer will magically pop on (hopefully that's what's going to happen soon). There's no message to suggest what was happening that whole time.
I've tried unplugging all my accessories and monitors and the computer to restart without any interferences. I've tried holding/tapping F8 with no luck. I can't get to any screens at all. The keyboard doesn't appear to be connecting either since the caps lock toggle doesn't do anything. The interior was dusted fairly recently. I cleared its temp files after the last startup and defragged at least one of my drives.
I badly need to figure out what's going wrong with it so I can get back on track.
* OS - Windows 7
* Monitors (x2) - ASUS PB278Q
* Graphics Card - GeForce GTX Titan
* Power Supply - Corsair AX860
* Motherboard - ASUS P9X79
* CPU - Intel i7-4930K
* RAM - Corsair Dominator Platinum 16GB (4x4GB)
* Corsair Hydro Series H75