Specifications

Procedure
1. WIth the optical door oriented upward, remove the four screws connecting the plastic
cable retainer to the chassis (Faraday cage).
Note: View the document at a larger size to enlarge this graphic.
2. Lift the plastic cable retainer from the chassis. Note: The fan gasket is stuck to the
back side of the plastic cable retainer.
Warning: Whenever the bottom housing is opened for service, you must do two things:
1.You must clean the original thermal film from the surfaces joining the thermal
interface layer and reapply thermal paste to the thermal pipe.
2. You must tighten the four torx screws on the bottom housing to a minimum of 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. Failure to follow either of these steps could cause
the computer to overheat and damage internal components.
Refer to the topic, “Thermal Paste Application” for detailed information.
Neck Cable Retainer (under fan)
iMac (Flat Panel) Take Apart - 59