Apple imac usb 2 0 User Manual

122 - iMac (USB 2.0)  Take Apart
 Back Cover, 20" Display
Procedure
1. Remove the three screws on the wire deflector Lift the wire deflector off the back 
cover.
2. Peel the rubber pads off the back cover and set them aside temporarily.  Replacement 
Note:   Before replacing the back cover or LCD panel, press the rubber pads back into 
the grooves on the shield before closing the panel. 

 iMac (USB 2.0)  Take Apart - 123
 Back Cover, 20" Display 3. Remove the last screw and gently feed the neck cables through the hole. 
Note: If the 
iMac is laying in the repair fixture, support the base of the computer when removing 
the screw shown below. This screw holds the neck to the back cover and the computer 
is unbalanced when the panel is removed. 
4. Align the TMDS connector with the notches and carefully feed the cable through the  hole.  

124 - iMac (USB 2.0)  Take Apart
 Back Cover, 20" Display
5. Lift the back cover off the neck extension. 

 iMac (USB 2.0)  Take Apart - 125
 Back Cover, 17" Display
Back Cover, 17 Display
Tools
This procedure requires the following tools:
• Torx-10 screwdriver
Part Location
Preliminary Steps
Before you begin, do the following:
• Position the computer in the service stand.
• Remove the flat panel display. 

126 - iMac (USB 2.0)  Take Apart
 Back Cover, 17" Display
Procedure
1. Note the location of the inverter (A),TMDS (B), microphone (C), and LED (D) cables. 
Remove four screws that secure the metal wire deflector and the base assembly to the 
back cover. Remove the metal wire deflector. 
2. Remove the tape from the neck cables. Pull the cables through the hole in center of  the back cover.  Note: The hole in the back cover is notched; align the wide TMDS 
connector with the notches. 

 iMac (USB 2.0)  Take Apart - 127
 Back Cover, 15" Display
Back Cover, 15 Display
Tools
No tools are required.
Part Location
Preliminary Steps
Before you begin, do the following:
• Position the computer in the service stand.
• Remove the flat panel display.
• Remove the panel shield. 

128 - iMac (USB 2.0)  Take Apart
 Back Cover, 15" Display
Procedure
1. Lift the display cover off the neck assembly.  

 iMac (USB 2.0)  Take Apart - 129
 Neck Extension Identification
Neck Extension Identification 
There are many neck assemblies and display panels for the iMac (Flat Panel) computers. 
Identify which neck assembly belongs in the system by the 620-xxxx tag attached to the 
TMDS cable (circled below). Refer to the Neck Identification table on the next page for 
more information. 

130 - iMac (USB 2.0)  Take Apart
 Neck Extension Identification
Neck Identification Table
Neck Assemblies  KBase Article 
For additional information and photos, refer to article 86525: iMac: Flat Panel Neck 
Assembly Differences.
Table 1: Neck Identification
Product Neck Part Number Neck Label 620-xxxx Use with 
Display
iMac (Flat 
Panel) 15", 
700 MHz/800 
MHz 661-2585 No Label on this neck
This neck has a blind mate 
connector, while later neck 
assemblies do not. 661-2582
iMac (17" Flat...

 iMac (USB 2.0)  Take Apart - 131
 Neck Assembly, 20" and 17" Displays
Neck Assembly, 20 and 17 
Displays
Tools
This procedure requires the following tools:
• Torx-10 screwdriver
Part Location
Preliminary Steps
Before you begin, do the following:
• Position the computer in the service stand.
• Remove the user access plate.
• Remove the bottom housing.
• Remove the drive carrier assembly.
• Remove the power supply.