User Guide

Troubleshooting Symptom Charts/ Modem Not Recognized - 38
Modem Not Recognized
The internal modem is
not recognized
1 Needed extensions or CCL files are not installed or are
corrupt. Are the correct CCL and extension files installed?
( Note: You will need the iMac Modem Extension and the iMac
internal modem CCL.)
Yes: The CCL or extension may be corrupt. Reinstall the CCL and
modem extension. If the problem persists, reinstall the system
software and try again.
No: Install the correct CCL and modem extension and try again.
2 Zap PRAM by holding down Option, Command– P–and R keys.
3 The modem card is loose, missing, or bad. Is the modem card
installed?
Yes: Reseat the modem card and try again. If the problem
persists, replace the modem card.
No: Install a modem card and try again.
Modem Dialing Problems
No Dial Tone 1 The phone line is not connected.
2 Is the phone line connected securely to the computer and to
the wall jack?
Yes: Go to the next step.
No: Reconnect the phone line at both ends and try again.
3 The phone line is dead.Plug a phone into that line. Do you get a
dial tone?
Yes: There does not appear to be a problem with the
phone line. Test the modem as explained in “Testing
the Modem” earlier in this chapter.
No: Report the dead phone line to the phone company.
4 Reseat the modem card. If the problem persists, replace the
modem card.