I was wondering if anyone else has experienced this problem: When I close the lid of my MBP, it goes to sleep as normal. However, sometimes when I open the lid back up, the screen just doesn't turn on. The computer is definitely on, I can hear the fan going and the computer making its computer sounds. But the sleep light indicator turns off when I open the lid, then turns back on when I close the lid again. Anyone able to help me out?