Dell Latitude E5420M (Early 2011) - Manual (Page 109)

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Installing the Coin-Cell Battery
Installing the Coin-Cell Battery
1. Connect the coin-cell battery to system board and secure it.
2. Replace the system board.
3. Replace the support brackets .
4. Replace the LED board.
5. Replace the display assembly.
6. Replace the ExpressCard/Smart Card/PCMCIA module .
7. Replace the palm rest .
8. Replace the processor .
9. Replace the heat sink .
10. Replace the CPU door .
11. Replace the wireless local area network (WLAN) .
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