100 Installing System ComponentsInstalling the Backplane1 Insert the backplane in the direction of the arrow until it is seated in thesystem.2 Secure the backplane to the system using the three screws.3 Replace all the hard drives in the system. See "Installing a Hard-DriveCarrier" on page 55.4 Replace the cooling fan assembly. "Installing the Cooling Fan Assembly"on page 96.5 Connect the SAS/SATA cables, the fan cables, and the power cable.See Figure 5-4.6 Replace the cooling shroud. See "Installing the Cooling Shroud" onpage 61.7 Replace the system cover. See "Closing the System" on page 59.8 Reconnect the system and peripherals to their electrical outlets,and turn on the system.Control Panel AssemblyCAUTION: Many repairs may only be done by a certified service technician.You should only perform troubleshooting and simple repairs as authorized inyour product documentation, or as directed by the online or telephone serviceand support team. Damage due to servicing that is not authorized by Dell isnot covered by your warranty. Read and follow the safety instructions that camewith the product.Removing the Control Panel Assembly1 Turn off the system, including any attached peripherals, and disconnectthe system from its electrical outlet.2 Open the system. See "Opening the System" on page 58.3 Remove the cooling shroud. See "Removing the Cooling Shroud" onpage 60.4 Slide the cable cover on the side of the system, toward the back of thesystem to remove it.