Apple PowerBook 165 - Manual (Page 54)

Troubleshooting Symptom Charts/Internal Modem - 30
Internal Modem
Strange mix of
characters appears on
screen
1 Verify that baud rate and data format settings of
communications application are compatible with internal
modem and remote modem.
2 Check phone cord connection and operation.
3 Remove and reseat modem card.
4 Verify that System is 7.1 or later.
5 Replace modem card.
6 Replace daughterboard.
7 Replace motherboard.
Modem interferes
with system sound
1 Remove and reseat modem card.
2 Replace modem board.
3 Replace interconnect card.
4 Replace motherboard.