Apple imac 20 inch early 2008 User Manual

iMac (20-inch Early 2008)  Take Apart — Hard Drive Data Cable 181
Replacing the Hard Drive Data Cable
Position the hard drive SATA cable on top of the chassis 1. 
Secure the cable to the chassis with clear kapton tape.2.  
Replace the logic board.3. 
4. Replace the hard drive .
Replace the right speaker.
5. 
Rep6.  lace the display panel.
Replace the front bezel.
7.  
Clean and replace the glass panel8.  . Note: This step is very important. Follow the procedures 
to ensure the glass is clean and free of...

iMac (20-inch Early 2008)  Take Apart — Mechanism Cover 18 2
Mechanism Cover
Tools
No tools are required for this procedure.
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass Pane
• l
F
• ront bezel
LCD display pane
• l
Speaker, righ
• t
Logic boar
• d
Hard driv
• e
Part Location 

iMac (20-inch Early 2008)  Take Apart — Mechanism Cover 18 3
Removing the Clutch Cover
Peel up the EMI tape from the top, bottom, and sides of the clutch cover.1. 
Lift the cover off of the clutch mechanism. 2.   

iMac (20-inch Early 2008)  Take Apart — Mechanism Cover 18 4
Replacing the Clutch Cover
Replace the metal clutch cover, and make sure the EMI tape holds the top, bottom, and sides 1. 
of the cover onto the mechanism and rear cover.
Replace the hard drive fan. 
2.  
Replace the logic board.3. 
Replace the right speaker4. .
Rep
5. lace the display panel.
Replace the front bezel.
6.  
Clean and replace the glass panel7. . Note: This step is very important. Follow the procedures 
to ensure the glass is clean...

iMac (20-inch Early 2008)  Take Apart — Clutch Mechanism 18 5
Clutch Mechanism
Tools
Torx T10 screwdriver• 
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass Pane
• l
F
• ront bezel
LCD display pane
• l
Speaker, righ
• t
• Power supply
Logic board
• 
Hard drive fan• 
Clutch cove• r
Stan
• d
Part Location 

iMac (20-inch Early 2008)  Take Apart — Clutch Mechanism 186
Removing the Clutch Mechanism
1. Using a Torx T10 screwdriver, remove the four clutch mounting screws.
Peel back the mesh EMI tape on the mechanism.2.  
Lift the clutch mechanism off the chassis and out of the rear housing.3. 
922-7020 

iMac (20-inch Early 2008)  Take Apart — Clutch Mechanism 18 7
Replacing the Clutch Mechanism
1. Adjust the clutch so that its chassis mounting holes align, and install the four screws that 
secure the clutch to the chassis.
Replace the strips of EMI tape on each side of the mechanism, press it into place.2.  
Locate the computer stand. Slide the top of the stand through the opening in the rear 3. 
housing of the computer.
Align the pins on the clutch mechanism to the holes in the stand.
4. 
922-7020 

iMac (20-inch Early 2008)  Take Apart — Clutch Mechanism 188
5. Install the seven clutch-to-stand mounting screws.
 
Replace the metal clutch cover.6. 
Replace the hard drive fan.7.  
Replace the hard drive
8.  .
Replace the logic board
9. .
Replace the power supply.
10.  
Replace the right speaker11 . .
Replace the display panel.
12.  
Replace the front bezel.13 . 
Clean and replace the glass panel14.  . Note: This step is very important. Follow the procedures 
to ensure the glass is clean and free of...

iMac (20-inch Early 2008)  Take Apart — Cable, DC, Power Supply/SATA/Inverter 18 9
Cable, DC, Power Supply/
SATA/Inverter
Tools
Torx T10 screwdriver• 
Torx T8 screwdriver• 
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass pane
• l
F
• ront bezel
LCD display pane
• l
Speaker, righ
• t
Speaker, lef
• t
CPU fa
• n
Logic boar
• d
Power suppl
• y
Hard driv
• e
Hard drive SATA cabl
• e
Optical driv
• e
Optical fa
• n
Disconnect 
• Inverter cable
Mechanism cove
• r
Hard drive fan
•...

iMac (20-inch Early 2008)  Take Apart — Cable, DC, Power Supply/SATA/Inverter 19 0
Part Location