Preliminary Steps

Before you begin, do the following: • Position the computer in the service stand.

Remove

the

user access plate.

Remove

the

bottom housing.

Remove

the

drive carrier assembly

Remove

the

power supply.

Remove

the

fan.

Remove

the

plastic cable retainer.

1. Remove the plastic cable retainer and turn it over. Gently peel the fan gasket off the back of the cable retainer.

Internal Video Cable Imac Lamp

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.

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