I'm sort of freaking out right now. I don't remember what I was doing on my macbook pro (bought July 2006) but when I returned to it I saw a checkered pattern of a bunch of rectangles all over the screen. So I turned it off by holding the power button. But when I turned it back on the same pattern showed up even before the grey screen with the apple. If I just let it go, sometimes the screen will change to the blue start up one, but it won't go anywhere after that. Other times it will just stay the grey screen with the apple and the spinning thing underneath. Please help me! The screen I have is pretty much what this guy is experiencing. Please help! thank you!