Alright so I Just got a macbook pro early 2008. It works great! Except when I Wake it from sleep and am prompted to enter my password in lion, when typing my password it will randomly goto sleep, and i have to wake it up again to sign it. And Just a couple minutes ago, I was watching a youtube video and it randomly shutdown, i pressed the power button to turn it on and it turned on for a second then shut down again, the restarted and shut down during the "bong". Then I Turned it on again and it seems fine, other than the fans on max when it was booting, and sometimes they will go back to max for a couple minutes, Is this a GPU issue? If so thats a relief, if not what is wrong with it?