74 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 10 Close the computer cover, reconnect the computer and devices totheir electrical outlets, and turn them on.NOTE: 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.11 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.12 If you removed a sound card, enter system setup, perform thefollowing steps:a Enter system setup, select Integrated Devices, and change thesetting for Sound to On.b Connect external audio devices to the audio connectors on the I/Opanel (see “I/O Panel—Small Form-Factor, Desktop, and Mini-Tower Computers”).13 If you removed an add-in network adapter, perform the following steps:a Enter system setup, select Integrated Devices and change thesetting for Network Interface Card to On.b Connect the network cable to the integrated connector on the I/Opanel (see “I/O Panel—Small Form-Factor, Desktop, and Mini-Tower Computers”).Expansion Card Cage (Small DesktopComputer Only)Removing the Expansion-Card CageCAUTION: Before you perform this procedure, see “SafetyInstructions.”1 Open the computer cover.
