Dell Inspiron 15 3521 Owner's Manual - Page 57

Replacing the Heat-Sink, Procedure, Postrequisites

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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 1 Clean the thermal grease from the bottom of the heat-sink and reapply it. 2 Align the screw holes on the heat-sink with the screw holes on the system board. 3 In sequential order (indicated on the heat-sink), replace the screws that secure the heat-sink to the system board Postrequisites 1 Replace the system board. See "Replacing the System Board" on page 49. 2 Replace the wireless mini-card. See "Replacing the Wireless Mini-Card" on page 39. 3 Replace the palm-rest. See "Replacing the Palm-Rest" on page 35. 4 Replace the keyboard. See "Replacing the Keyboard" on page 29. 5 Replace the optical-drive assembly. See "Replacing the Optical-Drive Assembly" on page 21. 6 Replace the hard-drive assembly. See "Replacing the Hard-Drive Assembly" on page 25. 7 Follow the instructions from step 3 and step 4 in "Replacing the Memory Module(s)" on page 17. 8 Replace the battery. See "Replacing the Battery" on page 13. 9 Follow the instructions in "After Working Inside Your Computer" on page 9. Replacing the Heat-Sink | 57

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Replacing the Heat-Sink
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57
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
1
Clean the thermal grease from the bottom of the heat-sink and reapply it.
2
Align the screw holes on the heat-sink with the screw holes on the system board.
3
In sequential order (indicated on the heat-sink), replace the screws that secure the
heat-sink to the system board
Postrequisites
1
Replace the system board. See "Replacing the System Board" on page 49.
2
Replace the wireless mini-card. See "Replacing the Wireless Mini-Card" on page 39.
3
Replace the palm-rest. See "Replacing the Palm-Rest" on page 35.
4
Replace the keyboard. See "Replacing the Keyboard" on page 29.
5
Replace the optical-drive assembly. See "Replacing the Optical-Drive Assembly" on
page 21.
6
Replace the hard-drive assembly. See "Replacing the Hard-Drive Assembly" on
page 25.
7
Follow the instructions from step 3 and step 4 in "Replacing the Memory Module(s)"
on page 17.
8
Replace the battery. See "Replacing the Battery" on page 13.
9
Follow the instructions in "After Working Inside Your Computer" on page 9.