On Mon, 25 Aug 2008, Peter Nevett wrote: . . . > Is it possible to start up the iBook from the OS9 CD, format the hard > drive and then try to install Panther? I have backed up the iBook but . . . Do check the firmware (as someone else suggested). Also try booting from an OS9 installer CD, and use the Drive Setup utility (I'm not sure of the name, it's been so long) to zero the HD while formatting as HFS+, ie choose the option to write zeros over the entire drive. Among other things this should force a check for bad HD sectors, etc. Then boot from the OS 10.3 installer CD and use its Disk Utility to format the HD again but just do a simple format, no zeroing. (I'd recommend choosing HFS+ journaled format, available with OS10.3., since it gives some protection against various errors during computer use.) This OS9 zeroing, then OS10.3 format again, trick has worked for me a couple of times working on old CT iMacs.