Got a Powerbook G4 with a "messed up" HD. Couldn't fix it, so got a firewire drive and ran a bunch of utilities from my newer intel iMac. Cloned the Powerbook's drive to a USB hard drive, did all repairs on the USB drive, formatted the Powerbook, cloned the USB drive BACK to the Powerbook, but it just gives me the flashing question mark when I try to boot. What is REALLY weird is I can boot my iMac FROM THE CLONE ON THE USB DRIVE and it works fine. What am I missing here? I've been working on this freakin laptop for over a week now... In Drive Genius the Powerbook drive (in TDM) shows as a single drive, but if I go to "Repartition" then it shows 3 smaller partitions on the drive; I believe they're called "Apple Free Space" or something like that (can't check right now, I'm running Repair on it AGAIN at the moment). I feel like I'm missing something simple, like the machine just doesn't see one thing that tells it "Oh, yeah! There's an operating system on this drive!" I have tried partitioning from Drive Genius and Disk Utility. Have done clones back and forth with Drive Genius, Disk Utility, and Carbon Copy Cloner. Same results each time. Help?!?