Early this week while I was typing a word document on my Mac (2006 MacBook) it randomly shut off. Well i tried to turn it back on and it made the traditional startup tone after pressing the power button, then this screen came up... . It has now been stuck on this screen for about 18 hours. I tried restarting it by holding the power button until it turned off, then turning it on again and it still gets stuck on this screen. I have already ruled out the RAM because i took my 2 1gig sticks out put my old 512's in, but it didnt do anythiing. I have all my data backed up so I didnt lose anything, but i really need the mac for work. Anybody have any suggestions of what to do? Or any ideas of what is causing this?? The next step I'm thinking of taking is replacing the internal hard drive to see if that was the problem. Thanks for the help!