These parts can be swapped between the 12" iBook G3 and the G4
SCREEN ASSY:
- LCD panel
- front bezel (inscription wont match)
- hinges
- back cover (with Apple logo) color wont match
- inverter board
- display latch mechanism
NB: cables CAN'T be swapped (connectors wont match on logic board).
Other compatibles parts:
- keyboard (please read rj713 comment)
- battery (color wont match)
- AC adapter
- hard drive (IDE 2'5" HD)
- bottom case screws and rubber feet (color wont match)
All other parts are model specific and can't be swapped:
- ram
- optical drive
- top case
- airport card
- logic board
- heat sink
- internal metal frame
- DC in board
- HD & optical drive cables
- fan
- etc.