Dell Inspiron 20 (3043, Mid 2014) - Manual (Page 31)

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
Follow the instructions from step 1 to step 8 in “Removing the Back Cover ”.
Procedure
1 Disconnect the antenna cables from the wireless card.
2 Remove the screw that secures the wireless card to the system-board
bracket.
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