7Before you close the card retention door, ensure that:

The tops of all cards and filler brackets are flush with the alignment bar.

The notch in the top of the card or filler bracket fits around the alignment guide.

alignment guide alignment bar

release tab

card retention door

8Close the card retention door by snapping it into place to secure the card(s).

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.

9Connect any cables that should be attached to the card.

See the documentation for the card for information about the card’s cable connections.

NOTICE: To connect a network cable, first plug the cable into the network device and then plug it into the computer.

10Replace the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.

11If you installed a sound card:

a Enter system setup (see page 103), 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.

Removing and Installing Parts

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Dell T8144 manual Alignment guide alignment bar