168 Installing System ComponentsSystem BoardRemoving the System BoardCAUTION: 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 is notcovered by your warranty. Read and follow the safety instructions that camewith the product.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 89.3 If applicable, remove the memory-riser blanks. See "Removing a Memory-Riser Blank" on page 99.4 Remove the memory risers. See "Removing a Memory Riser" on page 100.5 Remove the cooling fan assembly. See "Removing the Cooling FanAssembly" on page 118.6 Remove the power supply(s). See "Removing a Power Supply" on page 155.7 Remove all expansion cards, the I/O card, and the integrated storagecontroller card. See "Removing an Expansion Card" on page 128,"Removing the I/O Card" on page 134, and "Removing the IntegratedStorage Controller Card" on page 143.8 If applicable, remove the USB key from the system board. See "InternalUSB Memory Key" on page 120.9 If applicable, remove the NIC hardware key from the system board. See"Integrated NIC Hardware Key" on page 123.10 Remove the processor(s). See "Removing a Processor" on page 148.11 Remove the power distribution board. See "Removing the PowerDistribution Board" on page 161.
