Apple PowerBook 165 - Manual (Page 57)

Troubleshooting Symptom Charts/Miscellaneous - 33
Miscellaneous
No sound from
speaker
1 Verify that volume setting in Control Panel is above 0.
2 Verify that no external speaker is plugged in.
3 Check connections of speaker to interconnect board,
interconnect board to daughterboard, and daughterboard to
motherboard.
4 Replace interconnect board.
5 Replace daughterboard.
6 Replace motherboard.