Combined DC-in & sound board for 1GHz, 1.2GHz, 1.33GHz & 1.5GHz (BlueTooth 1.1) models of the 15" Aluminium PowerBook G4. This part will not fit the BlueTooth 2 version of the 1.5GHz PowerBook. This unit comprises the DC-in socket, the sound in & out mini-jack sockets and the left hand USB port. It connects to the logic board via the DC-cable and the audio flex cable, and to the speaker assembly.