My son has a Ibook G3, and I am aware that there was a logic board recall a year ago which I just found out about. I was just looking for some second opinions before purchasing a new hd and replacing it if this is not the cause. I have tried rebooting from the osx install cd, diagnosic cd but even with these system cds the machine will not boot up past the apple screen which just keeps on spinning and spinning. I tried connecting with firewire to my powerbook as an external drive, but it then tells me that the drive is not an osx format. With disk utility it allows me to start to reformat, but then the partioning bar just runs indefinitely. Any help would be greatly appreciated.