Bootcamp Windows 8.1 screen Dim/ Black

I bootcamped my macbook pro retina recently with Windows 8.1-- everything has been working perfectly except today when I tried bootcamping Windows would load but the screen would go completely dark. I was really worried until i noticed that I could barely make out the time display of the Window's start up clock and remembered that I dimmed my screen to turn off last night before I went to bed. However now, I can't seem to use the mac dimmness controls (F2) to illuminate the screen-- so I can't sign in or complete any task. I've tried turning on and off the computer and bootcamping a couple of ways, but nothing make the screen not black on my window's side.