My macbook pro cannot boot pass the blue screen, all startup keys failed to work (http://forums.macrumors.com/showthread.php?t=1075160). If all I need is one successful boot to copy all my files off the hard disk. Should I: A. leave it as it is and hope for the blue screen will eventually go away; B. keep rebooting and hope for the computer will boot up correctly by chance; or C. Power off and unplug everything, leave it overnight and try booting it again next morning? I've heard some people could get their computer back to normal just by option C, which sounds weird to me. Is that possible? How does that work?