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iMac (24-inch Early 2008)
20 June 2008
© 2008 Apple Inc. All rights reserved.
Apple Inc.
© 2008 Apple Inc. All rights reserved.
Under the copyright laws, this document may not be copied, in whole or in part, without the
written consent of Apple.
Every efort has been made to ensure that the information in this document is accurate. Apple is
not responsible for printing or clerical errors.
Apple
1 Ininite Loop
Cupertino, CA 95014-2084
USA
+ 1 408 996 1010
www.apple.com
Apple, the Apple logo, Mac, and Macintosh are trademarks of Apple Inc., registered in the U.S. and
other countries.
ii
iMac (24-inch Early 2008)
Contents
Manual Updates 7
Updated 20 June 2008 7
Product Introduced April 29, 2008 7
Take Apart
General Information 10
What’s New 10
Product Conigurations 11
Opening the Computer 11
Note About Images in This Manual 11
General Tools 12
Required Special Tools 12
View of the iMac with the Front Bezel Removed 14
View of the Modules with the Display Panel Removed 14
View of the Rear Housing and Cables 15
Back View 15
I/O Ports 16
Cleaning and Handling the Glass Panel 17
Do’s and Don’ts 18
Handling a Broken Glass Panel 18
Safety 19
EMI Shielding 20
Access Door 21
Memory 23
Glass Panel 26
Cleaning and Handling the Glass Panel 27
Isopropyl Alcohol (IPA) 28
Cleaning the Silicone Roller 28
Do’s and Don’ts 28
Metal Alignment Pins on the Glass Panel 29
Magnets on the Front Bezel 29
Removing the Glass Panel 30
Replacing the Glass Panel 33
Installing a Replacement Glass Panel 38
iii
Cleaning Tool Kit 41
Cleaning Tool Resources 41
LENSPEN Screen Cleaning Device 42
Ionizing Air Gun 43
Front Bezel 44
Camera Board 50
Battery 53
IR (Infrared) Board 56
AirPort Extreme Board 59
Bluetooth Board 63
LCD Display Panel 66
LCD Temp Sensor Cable 73
Left Speaker 79
Ambient Temp Sensor 83
Ambient Temp Sensor Cable 87
LVDS Display Cable 91
Right Speaker 97
Inverter Cable 100
Optical Drive Fan 104
CPU Fan 107
Power Supply, AC/DC 110
Hard Drive 117
Hard Drive Sensor Cable 124
Optical Drive 127
Optical Flex Cable 133
Optical Sensor Cable 136
Logic Board 140
Video Card 149
iv
Hard Drive Fan 154
Audio Board 157
Hard Drive Data Cable 160
Clutch Cover 163
Stand 166
Clutch Mechanism 171
Chassis 175
Camera Cable 180
Microphone Cable 185
Cable, DC, Power Supply/SATA 190
Rear Cover 195
Troubleshooting
General Information 199
Serial Number 199
Power On Self Test (POST) 200
Firmware Updates 200
Diagnostic LEDs 202
Apple Hardware Test (AHT) Error Codes 204
Logic Board Sensor and Fan Connector Locations, Top Side 206
Logic Board Sensor Locations, Back Side 207
Cleaning Tools for the LCD and Glass 207
LensPen Cleaning Tool 207
Symptom Charts 208
How to Use the Symptom Charts 208
Diagnostics 208
Apple Hardware Test (AHT) Error Codes 209
Power Issues 211
Glass Panel 214
System Shuts Down 215
Display 216
Hard Drive 217
Optical Drive 219
Fan Sound 226
AirPort 231
Bluetooth
(also see Wireless Issues topic) 232
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