I have a Windows 7 x64 OS on a M5A97 PLUS motherboard with a FX6300 and one 8GB DDR3 module. The graphic board is an NVIDIA GeForce 8400 GS. Have two disk; main an 480GB PNY SSD(about 8 months of use), secondary an 1TB Samsung HD103SI.
The problem is that when I hit the suspend button from the keyboard it shut off both screens but doesn't suspend the rest of the PC, even the keyboard still alive because I can turn on the Capslock and Numlock LEDs. The reset doesn't work either; the only way is by holding the power button.
I read the Event log and seems to be some trouble with the disk and also an application called Asus Fan Speed Control, or something like that.
Also I read that VirtualBox can cause this coin of problems, and that was one of the application that I have running at that moment.
Now I have Firefox 49.0.1 running and Windows Disk Manager open and can go to suspend mode with no problem.
Is there any way to know what is preventing Windows from going into sleep mode?