Dell Precision 490 Desktop User's Guide - Page 38

12. Rotate the card retention door until it snaps into place. 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. 13. Connect any cables that should be attached to the card. See the documentation for the card for information about the card's cable connections. 14. If the card was installed in a slot close to the hard-drive carrier, check to see if there are any cables or other protrusions that might block the card retention mechanism from being lowered completely. If this is the case: a. Pull up to free the card retention mechanism from the hard-drive carrier. b. Find the removable card-retention device (if installed) located at the base of the card retention mechanism, beside the hard-drive carrier. c. Grasp the removable card retention device between your thumb and forefinger and press the tip in as you pull to slide the removable device from the card-retention mechanism. 1 removable card-retention device 2 card-retention mechanism 15. Rotate the hard-drive carrier back into the computer (see Rotating the Hard-Drive Carrier Back into the Computer). 16. Ensure that all connectors are properly cabled and firmly seated. NOTICE: To connect a network cable, first plug the cable into the network device and then plug the cable into the computer. 17. Replace the computer cover (see Replacing the Computer Cover), reconnect the computer and devices to electrical outlets, and then turn them on. 18. If you installed a sound card: a. Enter the system setup program (see System Setup), select Integrated Audio, 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. 19. If you installed a network adapter card and want to disable the integrated network adapter: a. Enter the system setup program (see System Setup), select Integrated NIC, and then change the setting to Off. b. Connect the network cable to the network adapter cards connectors. Do not connect the network cable to the network connector on the back panel. 20. Install any drivers required for the card as described in the card documentation. Removing an Expansion Card 1. Follow the procedures in Before You Begin. 2. Remove the computer cover (see Removing the Computer Cover). 3. Rotate the hard-drive carrier out of the computer (see Rotating the Hard-Drive Carrier Out of the Computer). 4. Press the release tabs on the card retention door towards each other and pivot the door open.