Dell Precision 390 - Manual (Page 90)

b. Connect the network cable to the network adapter cards connectors. Do not connect the network cable to the network connector on the back
panel.
19. Install any drivers required for the card as described in the card documentation.
Removing a PCI Card
1. Follow the procedures in Before You Begin .
2. Remove the computer cover (see Removing the Computer Cover ).
3. Gently push the release tab on the card retention door from the inside to pivot the door open. Because the door is captive, it will remain in the open
position.
4. If your computer includes a card retention mechanism to secure the card in place from the top:
a. Pivot the mechanism upward and gently press the release tab downward to release the mechanism from the two tab slots holding it in place.
b. Set the retention mechanism aside in a secure location.
5. If necessary, disconnect any cables connected to the card. Grasp the card by its top corners, and ease it out of its connector.
6. If you are removing the card permanently, install a filler bracket in the empty card-slot opening.
1 release tab 2 card retention door 3 alignment bar
4 alignment guide 5 filler bracket
1 release tab 2 card retention mechanism 3 card retention door
NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets also keep dust
and dirt out of your computer.