Dell Latitude 5420 Rugged - Rear Input-Output Board; Removing the Rear I-O Board

4. Install the:
a) Docking port assembly
b) PCIe Heatsink assembly
c) WWAN card
d) WLAN card
e) Bottom chassis cover
f) Batteries
5. Follow the procedure in After working inside your computer.
Rear Input-Output Board
Removing the Rear I-O board
1. Follow the procedure in Before working inside your computer.
NOTE:
A 5 mm socket wrench should be used to remove/install the caps screws located in rear I/O space.
2. Remove the:
a) Batteries
b) WLAN card
c) WWAN card
d) PCIe heatsink fan assembly
e) Docking port assembly
f) Bottom chassis Cover
3. Loosen the two cap screws on the serial port in the rear I/O space [1].
4. Peel off the inductive tape on the I/O board FPC connector [2] and disconnect it [3] from the system board.
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Removing and installing components