Installing System Components 47optional diskette drive. A controller expansion card is required for SAS harddrives. Power is supplied to the system board and internal peripherals througha single nonredundant power supply.Opening the SystemCAUTION: Only trained service technicians are authorized to remove the systemcover and access any of the components inside the system. Before performing anyprocedure, see your Product Information Guide for complete information aboutsafety precautions, working inside the computer and protecting againstelectrostatic discharge.1 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.2 Press the power button to ground the system board.3 Lay the system on its side as shown in Figure 3-2.4 Open the system by sliding the cover release tab toward the rear of thesystem and lifting the cover off. See Figure 3-2.Closing the System1 Ensure that all internal cables are connected and folded out of the way.2 Ensure that no tools or extra parts are left inside the system.3 Reinstall the system cover:a Insert the bottom edge of the cover into the bottom of the systemchassis. See Figure 3-2.b Press down on the cover until the cover release tab snaps into place.4 Reconnect the system to the electrical outlet, and turn on the system andattached peripherals.After you open and close the cover, the chassis intrusion detector, ifenabled, causes the following message to appear on the screen at the nextsystem start-up:Alert! Cover was previously opened.
