Apple imac 20 inch early 2008 User Manual

iMac (20-inch Early 2008)  Take Apart — IR (Infrared) Board 61
Replacing the IR Board
1. If removed, connect the IR cable to the IR board.
Install the two T6 screws from IR board and connect the IR cable to the logic board.
2.  
 
Replace the front bezel.3. 
Clean and r4. eplace the glass panel. Note: This step is very important. Follow the procedures 
to ensure the glass is clean and free of particles.
Replace the access door
5. .
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iMac (20-inch Early 2008)  Take Apart — AirPort Extreme Card 62
AirPort Extreme Card
Tools
Torx T6 screwdriver• 
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass pane
• l
F
• ront bezel
Part Location 

iMac (20-inch Early 2008)  Take Apart — AirPort Extreme Card 63
Removing the AirPort Extreme Card
1. Using a T6 torx screwdriver, remove the 5-mm long screw and disconnect the two antenna 
cables from the AirPort Extreme card. Note: The antenna cables and connectors are very 
delicate and should be carefully removed by pulling on the antenna cable connector, not on 
the cable.
Holding the card by the edges, pull the AirPort Extreme card out of the slot.2.  
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iMac (20-inch Early 2008)  Take Apart — AirPort Extreme Card 64
Replacing the AirPort Extreme Card
Align the AirPort Extreme card with the slot on the logic board. Insert the board into the slot.1. 
2.  Connect the antenna cables to the connectors on the AirPort Extreme card.  
Note: The antenna cables might include an “L” or “R” tab near the connector end; however, 
you can disregard that because the cable position can be swapped without any change in 
performance. 
Replace the T6 screw.
3. 
Replace the...

iMac (20-inch Early 2008)  Take Apart — Bluetooth Board 65
Bluetooth Board
Tools
Torx T6 screwdriver• 
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass pane
• l
F
• ront bezel
Part Location 

iMac (20-inch Early 2008)  Take Apart — Bluetooth Board 66
Removing the Bluetooth Board
Disconnect the blue Bluetooth antenna from the top left corner of the board and the tiny, 1. 
black cable that connects from the Bluetooth board to the logic board. 
2.  Using a T6 torx screwdriver, remove the T6 screw from the lower left corner of the Bluetooth 
board.  Lift the Bluetooth board off the logic board.
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iMac (20-inch Early 2008)  Take Apart — Bluetooth Board 67
Replacing the Bluetooth Board
Connect the tiny, black Bluetooth cable to the Bluetooth board and to the logic board.1. 
Press the Bluetooth board onto the logic board connector. 2.  
Connect the Bluetooth antenna to the Bluetooth board.3. 
4. Replace the one T6 screw in the lower left corner of the Bluetooth board.
Replace the front bezel.5. 
Clean and r6. eplace the glass panel. Note: This step is very important. Follow the procedures 
to ensure...

iMac (20-inch Early 2008)  Take Apart — LCD Display Panel 68
LCD Display Panel
Tools
Torx T6 screwdriver• 
Torx T8 screwdriver• 
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass pane
• l
F
• ront bezel
Important:  To prevent the buildup of static charges which may attract dust particles to the 
surface of the display, store the LCD display panel in an anti-static bag whenever it has been 
removed from the system.
Part Location 

iMac (20-inch Early 2008)  Take Apart — LCD Display Panel 69
Removing the Display Panel
Place the computer with the display face up.1. 
2.  Remove the two T6 screws from the LVDS connector. Pull the black tab on the LVDS cable to 
disconnect it from the logic board.
3. Remove the eight 8-mm long T8 screws from the sides of the panel frame.
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iMac (20-inch Early 2008)  Take Apart — LCD Display Panel 70
Disconnect the display sensor cable from the connector on the left side of the logic board.
4.
 
Grasp the LCD panel at the bottom edge, and tilt up the panel. On the right side, disconnect 5. 
the four inverter cable connectors. Pull the connectors straight out. DO NOT pull on the 
wires.