Specifications

44 - PowerBook G4 (12-inch 1.33 GHz) Take Apart
Modem
6. Install the replacement modem, and reassemble and test the computer.
Replacement Caution: When placing the replacement modem on the logic
board, be sure to align the board and shield over the modem connector on the
logic board.
Handle the modem by the edges only. When securing the modem to the
logic board, press only on the rectangular area (highlighted in green in the following
image) that is directly over the modem connector.