I have a G4 PCI 350 mhz PowerMac running OSX and also Classic. My roommate was using it when it began acting "strange" (couldn't find files he knew existed), so he rebooted, but it got to "Waiting for Local Disks" (progress bar about 3/4 full) and hung up. Hours later, still nothing. I have run Norton Disk Doctor after booting from the Norton disk, and found a few Catalog B Tree problems, which were partially fixed by Norton. I also reset the PRAM, but nothing. I cannot boot from the system install disk, as it freezes up during the early stages of the installation - when it asks me to choose a start-up disk, no disk shows up to choose. I am able to boot from the Norton disk and connect to my external Firewire drive to backup files that are on the G4 - so it's reading the hard drive. But just won't start up normally. I cannot find anything online about this. Any ideas?