100 Instal ling Upgradesw w w . d e l l . c o m | s u p p o r t . d e l l . c o m 9 Replace the computer cover, reconnect the computer and peripheralsto their electrical outlets, and turn them on.NOTE: If enabled, the Chassis Intrusion option will cause the followingmessage to be displayed at the next system start-up:ALERT! Cover was previously removed.10 If you installed a sound card, perform the following steps:a Enter system setup, select Integrated Devices and change thesetting for Sound to Off.b Connect external audio devices to the sound card’s connectors.Do not connect external audio devices to the microphone, line-out, or line-in connectors on the system back panel (see "Back-Panel Connectors and Indicators").11 If you installed an add-in NIC, perform the following steps:a Enter system setup, select Integrated Devices and change thesetting for Network Interface Card to Off.b Connect the network cable to the add-in NIC’s connectors. Donot connect the network cable to the integrated NIC connector onthe system back panel (see "Back-Panel Connectors andIndicators").Removing an Expansion CardCAUTION: Before you perform this procedure, see "Safety First—For You and Your Computer."1 Turn off the computer and peripherals, disconnect them from theirelectrical outlets, wait at least 5 seconds, and then remove thecomputer cover.2 If you have a mini tower chassis and you are removing an AGP card,remove the AGP card brace.3 If necessary, disconnect any cables connected to the card.4 Remove the screw that secures the expansion card bracket to thechassis.Save the screw to use when installing the expansion card or fillerbracket later in this procedure.
