Today my old G4/400 (10.3.4) showed through "Software Update" an available hard drive firmware update that would let me know if my hard drive (19 GB) needed the update. It said it did so I installed... and now my G4 won´t boot. All I get is this white page where I can write in Unix to boot or quit. If I try to boot I get the starting mac os folder icon toggling between a question mark and a happy Mac back and forth but will never really boot. If I quit, the Mac shuts down and If i reboot, back to the white page and so on... Any thing I could do before I try to reinstall the whole system from the DVD drive? I hate this: -you plan a working day on your computer -something happens -and all day is wasted! Thank you!