I purchased this motherboard with a processor used on eBay. Ever since I have installed it, I cannot get the unit to properly sleep. The screens shut off, but the power light stays lit on the case. I have to hold the power button 5 seconds to have it shut off. However, the unit boots back up when I hit the power button to turn it back on. It loads all the windows I previously had left open. So sleep is "working", but not actually going to sleep. I also activated hibernate mode. This has the same issue as sleep. I have updated to the latest BIOS available. Any suggestions?