Step 34
Lift the top shield up from the right side, minding the upper left corner, which may catch on the metal framework.
Step 35 — Modem
Due to variations between iBook G4 models, your modem may look slightly different from the picture. All of the following steps apply to either model.
Remove the two Phillips screws at the corners of the modem.
Step 36
Lift the modem and modem shield from the bottom.