I'm not sure if this is a hardware question, but if it is not, please move this thread to the appropriate forum. My PowerBook G4 no longer boots into the Mac OS, I keep getting the message "Please restart the computer..." There is no way to get past this screen. I'm positive my data is still intact and that it is just the OS that's messed up. But is there a way I can access my documents so I can back them up?