I was deleting a BUNCH of old emails out of entourage from my work. Apparently my MBP didn't like that as it was very slow. Eventually it went to sleep and wouldn't wake up. I eventually did a hard manual shut off. But now when I hit power, the light on the front turns on, and it makes the wind up sound, but then nothing: screen remains blank, and I can't get the machine to do anything. Any thoughts? I've tried removing the battery, I've manual rebooted several times. It is plugged in an charged. But the screen won't come back to life. Help please if you can.