Apple imac 20 inch early 2008 User Manual

							iMac (20-inch Early 2008)  Take Apart — Power Supply, AC/DC 121
4. Connect the main DC power cable and the single-pin connector to the top left corner of the 
power supply. 
5. Replace the four screws, attach the machine screws to the right side of the power supply.
Replace the display panel6. .
Replace the front bezel.
7.  
922-6842
922-6800 
						

							iMac (20-inch Early 2008)  Take Apart — Power Supply, AC/DC 12 2
Clean and replace the glass panel8. . Note: This step is very important. Follow the procedures 
to ensure the glass is clean and free of particles.
Replace the access door
9. . 
						

							iMac (20-inch Early 2008)  Take Apart — Power Supply, AC/DC 12 3 
						

							iMac (20-inch Early 2008)  Take Apart — Hard Drive 12 4
Hard Drive
Tools
Torx T10 screwdriver• 
Torx T8 screwdriver (if removing clip from hard drive)• 
Preliminary Steps
Before you begin, remove the following:
A
• ccess door
Glass Pane
• l
F
• ront bezel
LCD display pane
• l
Part Location 
						

							iMac (20-inch Early 2008)  Take Apart — Hard Drive 12 5
Removing the Hard Drive
Disconnect the hard drive temperature sensor cable from the top of the logic board. 1. 
Push HARD on the black plastic clip and in the direction of the logic board to release the 2.  
hard drive clip from the chassis. Once the clip is released, pull the hard drive toward the top 
of the chassis to release the hard drive pins from the rubber grommets on the chassis. 
						

							iMac (20-inch Early 2008)  Take Apart — Hard Drive 126
Disconnect the power and data cables from the power supply end of the hard drive.
3. 
Lift the hard drive assembly from the computer assembly.4.
 
If you are replacing the hard drive continue with the procedure. Remove the temperature 5. 
sensor cable, screws, and screw pins. Transfer them to the replacement drive, and place the 
new foam gasket, included with the replacement drive, on top of the sensor.
6. At the lower side of the drive, remove the two screw pins.
922-7001 
						

							iMac (20-inch Early 2008)  Take Apart — Hard Drive 12 7
7. At the upper side of the drive, remove the two screws and the plastic clip.
922-7019 
						

							iMac (20-inch Early 2008)  Take Apart — Hard Drive 12 8
Replacing the Hard Drive
If you are installing a new hard drive, transfer the screws, screw pins and temperature sensor 1. 
cable to the replacement drive. Place the new foam gasket, included with the replacement 
drive, on top of the sensor.
2.  Orient the hard drive with the circuit board side of the hard drive facing up (as shown).
Connect the hard drive data and power cables to the hard drive.
3. 
Line up the two pins on the side of the hard drive with the two rubber grommets/openings 4. 
in the chassis.
Press the hard drive the rest of the way into the rear housing. You will hear a snap when the 
5. 
black plastic clip at the top hard drive clicks into place on the chassis.
If the sensor cable was disconnected from the top of the hard drive, peel off the foam gasket, 
6. 
slide the sensor-end of the cable into the sensor holder, and cover the sensor with a new 
foam gasket included with the replacement hard drive.  
						

							iMac (20-inch Early 2008)  Take Apart — Hard Drive 129
Connect the other end of the temperature sensor cable to the logic board.7. 
Replace the display panel8.  .
Replace the front bezel.
9. 
Clean and replace the glass panel10.  . Note: This step is very important. Follow the procedures 
to ensure the glass is clean and free of particles.
Replace the access door
11 .  . 
						

							iMac (20-inch Early 2008)  Take Apart — Hard Drive Sensor Cable 130
Hard Drive Sensor Cable
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
Part Location