Installing Upgrades 77NOTE: After you open and close the cover, the chassis intrusion detectorcauses the following message to appear on the screen at the next computerstart-up:ALERT! Cover was previously removed.14 Reset the chassis intrusion detector by changing Chassis Intrusion toEnabled or Enabled-Silent.NOTE: If a setup password has been assigned by someone else, contactyour network administrator for information on resetting the chassisintrusion detector.15 If you installed a sound card, perform the following steps:a Enter system setup, select Integrated Devices, and change thesetting for Sound to Off.16 Connect external audio devices to the sound card’s connectors. Do notconnect external audio devices to the microphone,speaker/headphone, or line-in connectors on the I/O panel (see “I/OPanel—Small Form-Factor, Desktop, and Mini-Tower Computers”).NOTE: Problems mayarise if two expansioncards are trying to use thesame resources: memory,I/O addresses, and IRQs.To avoid this type ofconflict, see “InterruptAssignment Conflicts”and the documentationthat came with the cardfor more information.17 If you installed an add-in network adapter, 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 network adapter’sconnectors. Do not connect the network cable to the integratedconnector on the I/O panel (see “I/O Panel—Small Form-Factor,Desktop, and Mini-Tower Computers”).Removing an Expansion CardCAUTION: Before you perform this procedure, see “CAUTION:Safety Instructions.”NOTICE: Before disconnecting a device from the computer, wait 10 to 20seconds after disconnecting the computer from its electrical outlet. Beforeremoving a component from the system board, verify that the standby powerlight on the system board has turned off. To locate this light, see “SystemBoard Components.”1 Turn off the computer and devices, disconnect them from theirelectrical outlets, and wait 10 to 20 seconds.2 Open the computer cover.3 In the small desktop computer, remove the expansion-card cage.
