Dell Dimension 5100 - Manual (Page 52)

8. Before you close the card retention door, 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.
9. Close the card retention door by snapping it into place to secure the card(s).
10. Connect any cables that should be attached to the card.
See the documentation for the card for information about the card's cable connections.
11. Replace the computer cover , reconnect the computer and devices to electrical outlets, and then turn them on.
12. If you installed a sound card:
a. Enter 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.
13. If you installed an add-in network adapter and want to disable the integrated network adapter:
1 bracket within slot 4 alignment guide
2 bracket caught outside of slot 5 fully seated card
3 alignment bar 6 not fully seated card
1 alignment guide 3 release tab
2 alignment bar 4 card retention door
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 port or device and then plug it into the computer.