Dell Latitude E5420M (Early 2011) - Manual (Page 99)

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System Board
Removing the System Board
1. Follow the procedures in Before Working On Your Computer .
2. Remove the battery .
3. Remove the subscriber identity module (SIM) card .
4. Remove the secure digital (SD) card .
5. Remove the back panel .
6. Remove the memory .
7. Remove the keyboard trim .
8. Remove the keyboard .
9. Remove the optical drive .
10. Remove the hard drive .
11. Remove the wireless local area network (WLAN) .
12. Remove the wireless wide area network (WWAN) .
13. Remove the CPU door .
14. Remove the heat sink :
15. Remove the processor .
16. Remove the palm rest .
17. Remove the ExpressCard/Smart Card/PCMCIA module .
18. Remove the display assembly .
19. Remove the LED board .
20. Remove the support brackets .
21. Disconnect the power connector cable.
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