I have a PowerMac G4 733 with a 60GB internal HD ,a Lacie 250GB external FW drive(for video editing), over 700MB of RAM, and I'm running the latest version of Panther. I've recently been having problems with FCP HD freezing up on me and not being able to Force Quit it. The only thing that would work would be restarting. After a while all I would get when I restarted would be a grey screen. Sometimes it would have a flashing question mark, sometimes not. I replaced the battery and reset the PMU and it ran fine. After about 30 min. It froze up again. I then hit restart and I got the grey screen. I eventually had to restart from the install disk. When I opened disk utility my hard drive did not show up. All my other drives did. I've checked everything I know how to check. I know a little about Mac's, but I'm certainly no Whiz. If anyone could help, I would greatly appreciate it.