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.
  1. Remove the four screws on the power supply metal shield. Set the shield aside. Important: The two screws near the door hinge are shorter than the other power supply screws. Failure to replace the shorter screws to their correct location will scratch the top housing. See step 4, Replacement Note in the Power Supply section for a picture.
  2. Remove the four screws on the power supply metal shield. Set the shield aside. Important: The two screws near the door hinge are shorter than the other power supply screws. Failure to replace the shorter screws to their correct location will scratch the top housing. See step 4, Replacement Note in the Power Supply section for a picture.

2. Slide the plastic door frame off the chassis.

3. Carefully remove the two door springs with a needlenose pliers.

4. Remove the door hinge screws.

6. Slide the door and hinge off the frame. Remove the door from the base.

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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