Dell Latitude E5420 (Early 2011) - Manual (Page 113)

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Installing The Input/Output (I/O) Panel
Installing the Input/Output (I/O) Panel
1. Place the I/O panel in the computer.
2. Tighten the screws to secure the I/O panel.
3. Replace the system board.
4. Replace the support brackets .
5. Replace the LED board.
6. Replace the display assembly.
7. Replace the ExpressCard/Smart Card/PCMCIA module
8. Replace the palm rest .
9. Replace the processor .
10. Replace the heat sink .
11. Replace the CPU door .
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