I was restarting my system, and an application wasnt closing, so i couldnt wait any longer, so i held in the power button to close it down. Now when i press the power button, I get the chime, and it then just sits on the grey screen and does nothing. I have tried the procedure for resetting the PRAM etc... I have tried pressing the shift button to boot into safe mode, and i have tried holding down the C key to boot from the Snow Leopard DVD, and none of them seem to work.. Anyone any other ideas? Tim.