So I was watching netflix last night and was trying to reduce the brightness of my screen and I saw the crescent moon symbol on the pause/break key but didnt know it was the pause/break key so I pressed it together with the function button then my pc just went to sleep mode and when I tried pressing the power button it turned on but the screen was blank and I can still hear the sounds of the movie I recently played and when I tried turning it off and back on it does the same thing. Please help??