Dell Inspiron 15 (5543, Early 2015) - Manual (Page 25)

Removing the Wireless Card
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.
Prerequisites
1 Remove the base cover .
2 Remove the battery .
Procedure
1 Remove the screw that secures the wireless-card bracket and the
wireless card to the system board.
NOTE: The wireless-card bracket may not be available on all
models.
2 Lift the wireless-card bracket off the wireless card.
3 Disconnect the antenna cables from the wireless card.
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