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5.2.6 External Card Replacement
Align the three screws holes on the external card with the studs, and tighten them
with 3 screws.
Note:
To install the network card, it needs to remove the cover of the corresponding
slots on the chassis rear window first.
5.2.7 Air Duct Replacement
Step 1: Open the upper cover of the chassis.
Step 2: Press and hold the both sides of the air duct, and then vertically remove the
air duct upwards.