Dell WHL, U7021 manual Retention arm Alignment guide Alignment bar Filler bracket

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8If you replaced a card that was already installed in the computer and you removed the top of the retention mechanism, you can reinstall the top.

9Before you lower the retention arm, 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.

10Press the retention arm into place, securing the card(s) in the computer.

retention arm

alignment guide

alignment bar

filler bracket

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.

11Connect any cables that should be attached to the card.

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

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

12Close the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.

13If you installed an add-in network adapter and you want to disable the integrated network adapter:

a Enter system setup (see page 119), select Network Controller, and then change the setting to Off.

b Connect the network cable to the add-in network adapter’s connectors. Do not connect the network cable to the integrated connector on the back panel.

14Install any drivers required for the card as described in the card documentation.

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Removing and Installing Parts