Filter
Top Products
PowerBook G4 (15-inch FW 800_1.5/1.33GHz) Troubleshooting - 27
Hardware Symptom Charts
Modem
No modem dial tone
1. Check that the correct modem is selected in the Network Port Configuration section of
the Network system preferences.
2. Verify known-good analog (not digital) telephone line.
3. Verify known-good RJ-11 telephone cable.
4. Verify RJ-11 cable is not plugged into Ethernet port (should not be physically possible
with this PowerBook).
5. Inspect RJ-11 connector for pin damage.
6. Verify RJ-11 telephone cable is firmly installed in the modem port.
7. Open Apple System Profiler, and under the Software tab look at Extensions. Check to
see that the MotorolaSM56K and AppleI2SModem Family files are listed and loaded.
If not, restart the system and check again. If still not visible replace system software.
8. Open Apple System Profiler, and under the Hardware tab look at Modem. It should
show the modem presence by indicating the Modem as Jump. If not visible, start
checking modem card connection.
9. Check RJ-11 wires to modem board. Replace the RJ-11 cable assembly, if bad.
10. Check modem flex cable is properly installed between the modem card and main logic
board. Replace cable if needed.
11. Replace modem card.
12. Replace logic board.
Modem does not respond (can hear dial tone)
1. Check that the correct modem is selected in the Network Port Configuration section of
the Network system preferences.
2. Check modem application is properly configured.
3. Open Apple System Profiler, and under the Software tab look at Extensions. Check to
see that the MotorolaSM56K and AppleI2SModem Family files are listed and loaded.
If not, restart the system and check again. If still not visible replace system software.
4. Check modem flex cable is properly installed between the modem card and main logic
board. Replace cable if needed.
5. Replace modem card.
6. Replace logic board.