Dell Latitude 5420 Rugged - Page 108

3. Tighten the two cap screws on the serial port [1] in the rear I/O space.
4. Connect the I/O board FPC [2] to the system board and then to I/O board itself [3] and secure it using a piece of tape [3].
5. Install the:
a) Docking port assembly
b) PCIe heatsink fan assembly
c) WWAN card
d) WLAN card
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Removing and installing components