Installing System Components 1558 If applicable, install the front bezel. See "Installing the Front Bezel" onpage 83.9 Reconnect the system to its electrical outlet and turn the system on,including any attached peripherals.System Board AssemblyThe system board assembly is divided into two boards which areinterconnected by a high-speed connector.• Processor board — has the connectors for the memory modules, powersupplies, and processors.• I/O board — has the connectors for expansion-card risers and expansioncard.Removing the System Board AssemblyCAUTION: Many repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in yourproduct documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is not coveredby your warranty. Read and follow the safety instructions that came with theproduct.CAUTION: If you are using the Trusted Program Module (TPM) with an encryptionkey, you may be prompted to create a recovery key during program or systemsetup. Be sure to create and safely store this recovery key. If you replace thissystem board, you must supply the recovery key when you restart your system orprogram before you can access the encrypted data on your hard drives.1 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.2 Open the system. See "Opening the System" on page 84.3 Remove the cooling shroud. See "Removing the Cooling Shroud" onpage 96.4 If installed, remove the front bezel. See "Removing the Front Bezel" onpage 83.5 Slide the front-chassis assembly away from the system. See "Front-ChassisAssembly" on page 98.
