Hello,at the time of power on a flashing question mark showing on center of the grey screen there is no other replay how to solve this............
our iBook is about 8 years old and your system software or hard drive is messed up. I'd suggest putting in your MacOS X DVD or CD and restart holding down the "c" key. They run the disk utility program and have it repair your permissions and your hard drive. If it can't, then you need a new hard drive.