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Apple M8347LL/A User Guide - Page 186

Modem Dialing Problems, No Dial Tone, Modem Cannot Dial Out

UPC - 718908355039

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Troubleshooting Symptom/Cure Tables: System Problems After Startup - 54 Modem Dialing Problems If the modem is having problems dialing out, refer to the table below for possible fixes. The table is divided into different sections, each with its own symptom and cure(s). Find your symptom and then follow the instructions under the "Possible Fix" column to resolve the problem. Note: A good first step in troubleshooting a modem problem is to verify the modem connection as explained in "Testing the Modem" earlier in this chapter. Possible Cause Possible Fix No Dial Tone: If the system gives you a No Dial Tone error message, refer to this section of the table. The phone line is not connected. 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. 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. There is a problem with the modem. Reseat the modem. If the problem persists, replace the modem. Modem Cannot Dial Out: If there is a dial tone, but the user cannot dial out with the modem, refer to this section of the table. The modem settings are incorrect. Open the modem control panel and make sure the modem type selected is iMac Internal 56K, (or Apple iMac internal modem in the Earthlink setup screen) the sound is On, and the dialing is set to Tone. At this point, leave the ignore dial tone setting unselected. The incorrect CCL file is selected or it is damaged. Verify you have the correct CCL selected. If the problem persists, reinstall the CCL file. There is a problem with the phone line or dial tone settings. Can you get a normal dial tone with the modem? Yes: Go to the next step. No: Some voice mail systems use a beeping dial tone to notify the user of waiting messages, which can affect the modem connection. Open the modem control panel and select Ignore Dial Tone.

Section	Page
iMac (Early 2001)	1
Take Apart	2
Take Apart	2
iMac (Early 2001)	2
Marketing Reference: Winter 2000-2001	2
Version 2, 400 MHz Logic Board (June 2001)	3
Thermal Pad Replacement	4
Tools	6
Procedures	7
Bottom Housing With Flip Foot	7
Bottom Housing Replacement Note	12
EMI Cover	13
SDRAM DIMM	17
AirPort Card	20
CD/HD Carrier	25
CD-ROM / DVD- ROM/CD-RW	29
CD-ROM, DVD-ROM,CD- RW Module Replacement	34
CD/DVD/CD-RW Adapter Board	37
Hard Drive	39
Hard Drive Replacement	43
Logic Board	44
Thermal Pad Information	50
Thermal Pad Installation	51
Down Converter Board	53
Modem	59
Modem Replacement	63
I/O Panel	64
Front Outer Bezel	68
Top Rear Housing	73
Divider Panel	79
Power/Analog/Video Board	81
Identifying Power/Analog/ Video Boards	95
Switch Instructions	96
LG CRT	97
CPT CRT	98
Side Panels	99
Antenna	105
Speakers	113
Headphone Board	115
Power/LED Board	117
CRT	119
Replacing the CRT	121
CRT Notice, July 2005	121
Switch Settings for the LG CRT	124
Identifying the LG CRT	125
Identifying the CPT CRT	126
Microphone	127
Replacing the Microphone	130
Troubleshooting	132
Introduction	133
What’s New and Different:	133
Searching the Knowledge Base	134
Troubleshooting Procedures	135
Block Diagram	136
Power Flow	137
Testing for Power	138
At the AC Outlet	138
At the Logic Board	139
Testing the Power/Analog Board Fuse	142
The PMU Chip	143
Resetting the PMU on the Logic Board	144
Power-On Self Test	145
Logic Board Battery	146
Ejecting a CD or DVD Disc, Part 1	147
Ejecting a CD or DVD Disc, Part 2	148
HFS Plus Formatted Drives	149
Testing the Modem	150
Symptom/Cure Tables: Startup Problems Before the Finder Appears	152
Note: If you are instructed to replace a module and this does not fix the problem, be sure to rei...	152
No Power	153
No Video or Unstable Raster	155
Gray Screen	157
Error Beep(s)	158
Incompatible RAM is installed.	158
Bad RAM.	158
Flashing Question Mark	159
System Hangs During Boot	160
Symptom/Cure Tables: System Problems After Startup	162
Note: If you are instructed to replace a module and this does not fix the problem, be sure to rei...	162
System Hangs	163
Distorted Video	164
Thin White Line	165
Tinting Video	166
Garbage Video	167
Intermittent Shut Down or Sleep	168
Memory Error Dialog	169
Can’t Wake From Sleep	170
Network Problems	171
CD_ROM or DVD-ROM Vibration	172
CD-ROM or DVD-ROM Won’t Eject	173
CD-ROM or DVD-ROM Not Showing on Desktop	175
Hard Drive Problems	176
Sound Out Problems	177
Sound In Problems	178
Noise From Computer After Shutdown	179
USB Problems	180
USB device experiencing a partial lack of power.	180
Bad USB device.	181
Bad logic board.	181
Cursor Problems	182
USB Printer Problems	183
Networked Printer Problems	184
Modem Not Recognized	185
Modem Dialing Problems	186
Modem Not Connecting	188
Modem Dropping Connection	190
Modem Performance Issues	191
System Freeze Occurs When Sleeping iMac Connected to Internet	191
Adjustments	193
Important: Adjustment Information	194
Light Meter Setup	196
Model R77	197
Jumper Adjustment Tool	200
Installing the Jumper	201
Focus Adjustment	204
Screen Voltage	207
Cutoff Adjustment	214
White Balance	224
Geometry Adjustments	231
S Correction Adjustment	237
Upgrades	242
Memory	243
AirPort Card	248
Connect an External Monitor	254
Exploded View	257
iMac (Early 2001) Exploded View	258
iMac (Early 2001) Cable Locator	259
iMac (Early 2001) Screw Matrix	260
iMac (Early 2001) Colored Service Parts	261

Match case Limit results 1 per page

Troubleshooting

Symptom/Cure Tables: System Problems After Startup - 54

Modem Dialing Problems

If the modem is having problems dialing out, refer to the table below for possible fixes.

The table is divided into different sections, each with its own symptom and cure(s).

Find your symptom and then follow the instructions under the

“

Possible Fix

”

column to

resolve the problem.

Note

: A good first step in troubleshooting a modem problem is to

verify the modem connection as explained in

“

Testing the Modem

”

earlier in this chap-

ter.

Possible Cause

Possible Fix

No Dial Tone:

If the system gives you a No Dial Tone error message, refer to this

section of the table.

The phone line is not con-

nected.

Is the phone line connected securely to the computer

and to the wall jack?

Yes

: Go to the next step.

: Reconnect the phone line at both ends and try

again.

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.

: Report the dead phone line to the phone company.

There is a problem with

the modem.

Reseat the modem. If the problem persists, replace the

modem.

Modem Cannot Dial Out:

If there is a dial tone, but the user cannot dial out with the

modem, refer to this section of the table.

The modem settings are

incorrect.

Open the modem control panel and make sure the

modem type selected is iMac Internal 56K, (or Apple

iMac internal modem in the Earthlink setup screen) the

sound is On, and the dialing is set to Tone. At this point,

leave the ignore dial tone setting unselected.

The incorrect CCL file is

selected or it is damaged.

Verify you have the correct CCL selected. If the problem

persists, reinstall the CCL file.

There is a problem with the

phone line or dial tone set-

tings.

Can you get a normal dial tone with the modem?

Yes

: Go to the next step.

: Some voice mail systems use a beeping dial tone to

notify the user of waiting messages, which can affect

the modem connection. Open the modem control panel

and select Ignore Dial Tone.