Hi, I'm sorry if I get some of the terminology wrong here. My computger shows the flashing question mark in a folder icon upon booting just after the chime. I've been reading up all about it and am pretty clear about what actions I should take. The very first direction that all instructions give me is to insert the Startup CD, shut down, and then restart holding down the 'C' key. The problem I'm encountering is that a little while after starting up, the computer ejects the CD, and then goes onto show the flashing question mark again. I'm pretty sure i'm inserting the correct CD as it does itself have the directions to hold down 'C' for booting from CD printed on it. I've tried the other CD which came with my MacBook too, but the same result. I've booked a slot with a Genius on Tuesday, but does anyone have any suggestions as to why it would be ejecting the CD? Thanks. p.s I've also tried to boot in target disk mode, and although the attached PowerBook sees the harddrive in disk utility, the repair utilities are greyed out, and it doesn't see it in finder so can't access the contents.