Q: i need a powerbook g3 400mhz operating system to replace the crashed one.

hi, i have a powerbook g3 400mhz laptop and lots of data on the harddisk. The system shows an error and a bomb and then freezes.

I tried all key combinations to restart but to no avail. Also I lost the original operating system disks. How can I save my data or install a fresh operating system. please help.