Dell Inspiron 15 (7548, Late 2014) - Manual (Page 45)

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 Working Inside Your Computer . After working inside your
computer, follow the instructions in After Working Inside Your
Computer . For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
CAUTION: Incorrect alignment of the heat sink can cause damage to
the system board and processor.
NOTE: The original thermal grease can be reused if the original system
board and heat sink are reinstalled together. If either the system board
or the heat sink is replaced, use the thermal pad provided in the kit to
make sure that thermal conductivity is achieved.
Procedure
1 Align the captive screws on the heat sink with the screw holes on the
system board.
2 Tighten the captive screws that secure the heat sink to the system board.
3 Adhere the mylar tape over the memory modules.
Post-requisites
1 Replace the battery .
2 Replace the base cover .
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