did enable the display adapter to wake after sleep? Maybe you answered that in the OP, apologies if so.
Thanks for your reply. When you say display adapter, do you mean the video card or the monitor? In the case of the video card, when I go into power management settings in the AMD Vision Engine Control Center, it reflects what I have already set in the "Power Options" on the Windows Control Panel - in this case to go to sleep in one hour of no activity. For the monitor, I never had to turn this on before, but I tried by setting the Power Saver & Power On Recall to save, but it didn't work.
I apologize for not making this clear in my post above, but the computer itself wakes up fine. I also tried turning off the monitor and turning it back on, too. The monitor states that it's scanning for a VGA connection (using the 15-pin D-Sub connector as I don't have a compatible DVI cable that will fit on the video card) , but it says "No Signal."
****UPDATE - 10-14-2013****
Well it seems I spoke too soon. Apparently when I changed the power settings on my monitor it goes to sleep and wakes up when I use the keyboard or mouse. I don't know why it didn't before, nor why my video card won't wake up when using only the power settings via the Windows Control Panel. Problem solved for now.