5. Reseat the card retention mechanism in the tabs and pivot downward to snap it into place.
6. Close the card retention door to snap it into place, securing the card(s).
7. Replace the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
8. Remove the card's driver from the operating system.
9. If you removed a sound card:
a. Enter system setup, select Audio Controller, and then change the setting to On.
b. Connect external audio devices to the audio connectors on the back panel of the computer.
10. If you removed an add-in network connector:
a. Enter system setup, select Network Controller, and then change the setting to On.
b. Connect the network cable to the integrated connector on the back panel of the computer.
11. Install any drivers required for the card as described in the card documentation.
Drive Panels

Removing the Drive Panel

1. Follow the procedures in "Before you Begin."
2. Grasping the lever on the sliding plate, pull the sliding plate to the right until it snaps into the open position.
NOTICE: To connect a network cable, first plug the cable into the network device and then plug the cable into the computer.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover.
1
drive panel
2
sliding plate
3
sliding plate lever