Dell Latitude E6420 (Early 2011) - Manual (Page 97)

Installing the Input/Output (I/O) Board
1. Replace the I/O board in the computer.
2. Tighten the screw securing the I/O board to the computer.
3. Install the System Board .
4. Install the ExpressCard Cage
5. Install the Palmrest Assembly .
6. Install the Modem Card .
7. Install the Keyboard .
8. Install the Keyboard Trim .
9. Install the Bluetooth Card .
10. Install the Heat Sink and Processor .
11. Install the Coin Cell Battery .
12. Install the WWAN Card .
13. Install the WLAN Card .
14. Install the Hard Drive .
15. Install the Memory .
16. Install the Optical Drive .
17. Install the Express Card .
18. Install the Base Cover .
19. Install the SD Card .
20. Install the Battery .
21. Install the ATG Port Cover (only for E6420 ATG systems).
22. Install the ATG Handle (only for E6420 ATG systems).
23. Follow the procedures in After Working Inside Your Computer .
97