Hi,
the only two things you can upgrade are the RAM and HD - both cheaply. No G4 Powerbooks had removable, replaceable CPUs (last would be the Powerbook G3 "Pismo", that can be upgraded to G4 but never in high volumes)
JB
the only two things you can upgrade are the RAM and HD - both cheaply. No G4 Powerbooks had removable, replaceable CPUs (last would be the Powerbook G3 "Pismo", that can be upgraded to G4 but never in high volumes)
JB