Apple iMac (Flat Panel Dokumentacja Pobierz pdf (Strona 126)

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iMac (17-inch Flat Panel, 1GHz) Troubleshooting -

Sound Out Symptom Charts

Sound Out

No sound from either internal or external speakers

1. Verify volume setting is correct in system preferences.

2. Replace the external speakers or headphone in question with a known-good device.

3. Reset parameter RAM. Press Command-Option-P-R during startup before “Welcome to Macintosh”

appears.

4. Verify internal speaker cable is connected.

5. Replace the internal speaker.

6. Replace the logic board.

1 2 ... 121 122 123 124 125 126 127 128 129 130 131 ... 155 156

Service Source 1
Take Apart 3
Service Stand 5
User Access Plate 6
Memory, SO-DIMM (user 10
Bottom Housing 13
RJ-11 Modem Filter Board 20
Part Location 22
Preliminary Steps 22
Memory (factory-installed) 24
Logic Board 28
Bluetooth Board, Wireless 31
I/O Port Covers 34
AirPort Antenna Extension 36
Thermal Pad Installation 38
AC Line Filter 40
Power Supply 49
Optical Drive Door 54
Speaker, Internal 59
Power Supply Insulators 63
Fan Gasket 68
Cap, Neck Spoke Retainer 70
Chassis (Faraday Cage) 73
AirPort Antenna 78
Display, Flat Panel 87
Display, Flat Panel 89
Replacing the Display 93
Inverter 95
Microphone 98
Back Cover, Display 99
Procedure 100
Neck Assembly 101
 Service Source 103
Troubleshooting 103
General Information 104
Logic Board, Top 106
Logic Board, Bottom 107
I/O Ports 108
The PMU Chip 108
Diagnostic Test Points 110
Logic Board Battery 111
Thermal Paste Application 113
Symptom Charts 116
No Power 117
No Video 119
Display Tilt 121
Hard Drive 124
Optical Drive 125
Sound Out 126
Sound In 127
Error Beep(s) 128
No modem dial tone 129
Upgrades 131
Memory, SO-DIMM 132
Memory, SO-DIMM 134
Installing the Memory Module 136
Closing the Computer 137
AirPort Extreme Card 138
Opening the Computer 139
AirPort Extreme Card 140
Exploded View, (1GHz) 146
Display Panel, (1GHz) 147
Screw Matrix Locator 1 of 7 149
Screw Matrix Locator 2 of 7 150
6 iMac (Flat Panel, 1GHz) 151
Screw Matrix Locator 4 of 7 152
Screw Matrix Locator 5 of 7 153
Screw Matrix Locator 6 of 7 154
Screw Matrix Locator 7 of 7 155
Screw Chart 156

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Apple iMac (Flat Panel Dokumentacja Strona 126

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