Apple IMAC User Manual - Page 120
Modem Not Recognized, Modem Dialing Problems, Symptom Charts/ Modem Not Recognized - 38
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Troubleshooting Symptom Charts/ Modem Not Recognized - 3 8 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. No Dial Tone Modem Dialing Problems 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.