When in hibernate, you don't just wiggle the mouse or push a button, you have to press the power button again (which should be flashing on and off), then it will restart and take you to the Windows login screen to select your profile.
Try holding the button for a few seconds and see if it works. If holding the button down does not work, then after holding it down, press it once and wait for a minute
If this isn't working, turn the power off at the switch on the PSU and unplug the cable, then wait ~15 secs for power to drain.
Look at your motherboard manual for the CMOS jumper reset. If you can't find it, post your motherboard manufacturer/model and I'll point you to it. There will be 3 pins covered by a little cap. You want to take the little cap off the jumper and move it to the other two pins (the middle will still be populated, but if the left was covered, now the right will) and leave it there for a couple of seconds, then you want to take it off again and put it back to the original position.
Plug everything back in and try again.