Dell Latitude E5420 (Early 2011) - Manual (Page 91)

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Installing the Modem Card
Installing the Modem Card
1. Connect the modem cable.
2. Attach the connector on the back of the modem card to the connector on the I/O panel.
3. Replace the support brackets .
4. Replace the display assembly .
5. Replace the palm rest.
6. Replace the CPU door .
7. Replace the keyboard .
8. Replace the keyboard trim
9. Replace the optical drive.
10. Replace the back panel.
11. Replace the battery.
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