Temporarily No Wakey Wake from Sleep Mode

So I'm not sure if I should be worried if this is a one time thing or not? I put the computer in sleep mode a few times a day and shut it down at night... Well I resumed a session about a half hour ago, the computer seemed to make all the right noises, except it didnt produce video
on the monitor? I checked the cable, it even said it was plugged in, I unplugged it into the
other DVI connections on the other video card to see if that helped, nothing. I did two hard shut downs and nothing..? Finally unplugged it from the back and it popped back on fine.

I don't think NVIDIA beta drivers would do this would it? Using them for BF3... Should I
be worried and be looking for a new Video Card? Found nothing in Event Viewer to indicate a problem.

Make sure the monitor is on.

Im kidding but seriously, do you have lights on your monitor letting you know you have power?

I would turn the machine off, unplug the power cable and then holding the power button to drain any residual power out. I've also seen sometimes a power cable has slipped part of the way way out of a monitor and it has a light but not enough power to do the video. I would unplug the power cable from the back of the monitor and do about the same on it. Hopefully you get it to fire up.

Didnt need to unplug the monitor as for some reason unplugging the computer seems to have fixed it. started it up and shut down 2 more times since, this I hope phantom problem...

May be the beginnings of a failing PSU. If mine goes to sleep, or I shut it down, I have to unplug it and then back in before it will come back up.

hmmm? psu... well its under warranty. monitor warranty expired last year. so far no more problems.