Dell Vostro 1520 (Early 2009) - Manual (Page 73)

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Wireless Wide Area Network (WWAN) Card
Dell™ Vostro™ 1520 Service Manual
Removing the WWAN Card
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the battery from the computer.
3. Remove the hard drive and mini-card access panel from the computer.
4. Disconnect the antenna cables from the WWAN card.
5. Remove the screw that secures the WWAN card to the system board.
6. Remove the WWAN card from the computer.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.