Dell OptiPlex GX280 - Manual (Page 91)

9. Press the retention arm into place, securing the card(s) in the computer.
1 alignment guide
2 filler bracket
3 alignment bar
4 retention arm
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.
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.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.
11. Close the computer cover, reconnect the computer and devices to electrical outlets, and turn them on.
After you open and close the cover, the chassis intrusion detector, if installed and enabled, causes the following
message to appear on the screen at the next computer start-up:
ALERT! Cover was previously removed.
12. Reset the chassis intrusion detector by changing Chassis Intrusion to On or On-Silent.
NOTE: If an admin password has been assigned by someone else, contact your network administrator for information
on resetting the chassis intrusion detector.
13. If you installed a sound card:
a. Enter system setup , select Audio Controller, and 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.
14. If you installed an add-in network adapter and want to turn off the integrated network adapter: