I have a 13" macbook purchased 2007 just out of the extended protection plan this summer. Last night while watching a video in full screen it froze with the beach ball for over 20 minutes with no sign of stopping. I had my external WD drive hooked up which is my iTunes drive (only). I had to manually shutdown the computer (with external still hooked up) After trying to reboot I got the flashing question mark and continue to get it no matter what I do. I've removed the external drive, reset the PRAM, tried booting in safe mode, tried booting from installation disc but my hard drive doesn't even appear in disk utility. Not sure what else I can try as nothing has worked. Any words of wisdom out there? Thanks for any help you can give!