Hey guys. I have a custom built and the other day it just suddenly stopped sleeping properly. It just clicks off (no blinking light like usual) and starts up back with an error message which comes off quickly and then the system restarts. I'm using Windows 8.1 with an ATI R7 GPU. I've tried everything; even a clean install of windows and no luck in trying to fix it. The system is fairly new so I don't think it should be an hardware issue already. It's so frustrating.