1. Remove the four torx screws.
Replacement Note: These torx screws must be tightened to at least 17 in.-lbs. If you do not have a torque driver, you will have to make sure these screws are tightened by hand FIRMLY, BUT NOT FORCIBLY. Or, purchase the service tool (076-0899) in order to ensure the thermal pipe is firmly mated with the top base. If the bottom housing is not securely attached to the base in this fashion, the CPU may overheat and become damaged. For more information, refer to "Thermal Paste Application'" in this chapter.Rotate the base so that the optical drive door is on the right.
2. Rotate the base so the optical drive door is on the right. Gently open the bottom housing in the direction of the arrow. Note: Cables are still attached to the logic board.
Important: Diagnostic service cables allow the unit to run while the bottom housing is open (as shown above). However, the computer cannot run for more than five minutes with the bottom housing open. If it is open longer, the CPU may overheat and become damaged.
3. Disconnect the following: A Power supply connector B Hard drive/optical drive data cable C AC line filter connector D AirPort antenna connector E Plastic cable retainer and video cable F Grounding screw
Note: View the document at a larger size to enlarge this graphic.
4. Set the bottom housing aside.
Refer to the topic, "Thermal Paste Application" for detailed information.
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