Dell Precision 390 - Manual (Page 93)

10. If you replaced a card that was already installed in the computer and you removed the retention mechanism, you may reinstall the retention mechanism.
11. Before replacing the card retention mechanism, ensure that:
l The tops of all cards and filler brackets are flush with the alignment bar.
l The notch in the top of the card or filler bracket fits around the alignment guide.
12. Snap the card retention mechanism into place, securing the card.
13. Replace the computer cover, (see Replacing the Computer Cover ), reconnect the computer and devices to electrical outlets, and then turn them on.
14. If you installed a sound card:
a. Enter system setup (see Entering System Setup ), select Audio Controller, and then change the setting to Off.
b. Connect external audio devices to the sound card's connectors. Do not connect external audio devices to the microphone, speaker/headphone,
or line-in connectors on the back panel.
15. If you installed a network adapter card and want to disable the integrated network adapter:
a. Enter system setup (see Entering System Setup ), select Network Controller, and then change the setting to Off.
b. Connect the network cable to the network adapter card. Do not connect the network cable to the integrated connector on the back panel.
16. Install any drivers required for the card as described in the card documentation.
1 alignment guide 2 bracket caught outside of slot 3 bracket within slot
4 alignment bar 5 fully seated card 6 not fully seated card
1 release tab 2 card retention mechanism 3 release tabs (2)
NOTICE: Do not route card cables over or behind the cards. Cables routed over the cards can prevent the computer cover from closing properly or
cause damage to the equipment.
NOTICE: To connect a network cable, first plug the cable into the network adapter and then plug the cable into the computer.