Dell OptiPlex GX280 - Manual (Page 310)

6. Lower the retention arm and press it into place.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.
7. 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.
8. 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.
9. Remove the card's driver from the operating system.
10. If you removed a sound card:
a. Enter system setup , select Audio Controller, and change the setting to On.
b. Connect external audio devices to the audio connectors on the computer back panel.
11. If you removed an add-in network connector:
a. Enter system setup , select Network Controller, and change the setting to On.
b. Connect the network cable to the integrated connector on the computer back panel.
PCI Express Cards
Your computer supports one PCI Express x16 card and one PCI Express x1 card.
1 PCI Express x16 card 3 PCI Express x1 card slot
2 PCI Express x1 card
4 PCI Express x16 card slot
If you are installing or replacing a PCI Express card, follow the procedures in the next section. If you are removing but not
replacing a card, see " Removing a PCI Express Card ."
If you are replacing a card, remove the current driver for the card from the operating system.
If you are installing or replacing a PCI card, see " Installing a PCI Card ."