I have a Macbook Pro Model Number MB470*/A and I left it on the other night and the battery died of course. But when I went to turn it back on in the morning it would not come on and I got the flashing folder icon with the question mark. I tried to use the Snow Leopard disk to see what may be happening, but the hard drive never showed up in the disk utilities. However a USB drive did show up in disk utility. I made sure the drive was connected and it is. I tried to remove it but stripped the screw. Now I can't take it out. Does anyone have any ideas that may be able to help me out? Thank you so much, any help is appreciated.