I was given a aluminum powerbook g4 and it worked great. It hadn't been used in a while and had updates that needed done. I started the update process and something happened and it froze. I had to restart it and it hasn't worked since then. It just keeps rebooting. I've done some research and tried everything I can find. I somehow got some text on screen once that said no platform. I've gotten a folder with a smiley face and a question mark and also gotten a picture of a hard drive with an x in the bottom right corner. It won't boot from the disk and I can't get it to boot from a jump drive. I don't have anything that hooks up with firewire, only usb. Is there anything else I can do or does the hard drive need replaced?