Apple led cinema display 27inch User Manual

 Apple Technician Guide
LED Cinema Display (27-inch)
  Updated: 2010-11-18  

 Apple Inc. 
© 2010 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 effort has been made to ensure that the information in this document is accurate. Apple 
is not responsible for printing or clerical errors.
Apple 
1 Infinite 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...

LED Cinema Display (27-inch)
Contents
About This Guide
Updates 7
Updated 18 November 2010  7
Introduced 24 September 2010  7
Feedback 7
Basics
Overview 9
Identifying Features  9
System Requirements  9
Product Configurations  9
Safety Precautions 10
Serial Number Location  11
Serial Number on Stand 11
Serial Number on Mechanism  11
Troubleshooting
General Troubleshooting 13
Troubleshooting Theory 13
Update System Software & Firmware  13
Display Adapters  13
Check Audio Features of Connected Computer  13...

Display Issues 23
Blank / No Video, No Backlight  23
Noise / Unstable Flicker  26
Unstable Brightness / Brightness Progressively Getting Low  28
LCD Image Issues  30
Physical Damage  35
Uncategorized Symptoms  35
Input/Output Issues 36
USB Issues 36
Camera Issues  38
Audio Issues  39
Uncategorized Symptoms  42
Mechanical Issues 43
Noise / Hum / Vibration  43
Burnt Smell / Odor  44
Fan Failures / Thermal Issues  45
Mechanical Physical Damages  46
Uncategorized Symptoms  46
Take Apart
General Information...

LCD Ground Cable 73
Camera  75
EEPROM Reset Tool  77
Camera Cable 79
Power Supply  80
DC Power Cable  82
Fan  84
Removal  87
Ambient Temp Sensor Cable  87
Logic Board  88
Logic Board Connectors  91
EDID Reset Tool  92
Left Speaker 93
Right Speaker  95
Subwoofer  97
All-in-One Cable  99
Mechanism  102
Rear Housing  105
Additional Procedures
Retrieving Mechanism  108
Views
Exploded View 113
Screw Chart  114
Internal Views  115
Photo of Components below LCD  115
External Views 116
Front View 116
Rear View...

© 2010 Apple Inc. All rights reserved.
 Apple Technician Guide 
About This Guide
LED Cinema Display (27-inch)   

LED Cinema Display (27-inch) — Updates 7 2010-11-18
Updates
Updated 18 November 2010
Take Apart
• LCD Panel and Logic Board: Added instructions to download and run the EDID Reset Tool 
after replacing either the LCD panel or logic board.
Introduced 24 September 2010
Feedback
We want your feedback to help improve this and future Technician Guides!   
Please email any comments to:  [email protected]   

© 2010 Apple Inc. All rights reserved.
 Apple Technician Guide 
Basics
LED Cinema Display (27-inch)   

LED Cinema Display (27-inch) Basics — Overview 9 2010-11-18
Overview
Identifying Features
The LED Cinema Display (27-inch) is an active-matrix liquid crystal display with LED backlight 
that includes a built-in iSight camera with microphone and a 2.1 speaker system (49 watts 
maximum). It supports resolutions up to 2560 by 1440 pixels. The all-in-one cable creates 
a docking station for portable computers, providing a universal MagSafe (up to 85W ), Mini 
DisplayPort with audio support, and three...

LED Cinema Display (27-inch) Basics — Safety Precautions 10 2010-11-18
Safety Precautions
Warning: HIGH VOLTAGE: The AC/DC power supply board and logic board remain powered 
up whenever the system is plugged in, whether or not system has been turned on. Use 
extreme caution when troubleshooting system with the glass panel removed.