Dell 5521, 3521 manual Replacing the Heat-Sink, Procedure, Postrequisites

Replacing the Heat-Sink

WARNING: Before working inside your computer, read the safety information that shipped with your computer and follow the steps in "Before You Begin" on page 7. After working inside your computer, follow the instructions in "After Working Inside Your Computer" on page 9. For additional safety best practices information, see the Regulatory Compliance Homepage at dell.com/regulatory_compliance.

Procedure

1Clean the thermal grease from the bottom of the heat-sink and reapply it.

2Align the screw holes on the heat-sink with the screw holes on the system board.

3In sequential order (indicated on the heat-sink), replace the screws that secure the heat-sink to the system board

Postrequisites

1Replace the system board. See "Replacing the System Board" on page 49.

2Replace the wireless mini-card. See "Replacing the Wireless Mini-Card" on page 39.

3Replace the palm-rest. See "Replacing the Palm-Rest" on page 35.

4Replace the keyboard. See "Replacing the Keyboard" on page 29.

5Replace the optical-drive assembly. See "Replacing the Optical-Drive Assembly" on page 21.

6Replace the hard-drive assembly. See "Replacing the Hard-Drive Assembly" on page 25.

7Follow the instructions from step 3 and step 4 in "Replacing the Memory Module(s)" on page 17.

8Replace the battery. See "Replacing the Battery" on page 13.

9Follow the instructions in "After Working Inside Your Computer" on page 9.

Replacing the Heat-Sink 57