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Dell EMC PowerEdge R740xd2 Installation and Service Manual

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Removing the system board

Prerequisites

CAUTION:If you are using the Trusted Platform Module (TPM) with an encryption key, you may be prompted to create a recovery key during program or System Setup. Be sure to create and safely store this recovery key. If you replace this system board, you must supply the recovery key when you restart your system or program before you can access the encrypted data on your drives.
CAUTION:Do not attempt to remove the TPM plug-in module from the system board. Once the TPM plug-in module is installed, it is cryptographically bound to that specific system board. Any attempt to remove an installed TPM plug-in module breaks the cryptographic binding, and it cannot be re-installed or installed on another system board.
  1. Follow the safety guidelines listed in Safety instructions.
  2. Power off the system and all attached peripherals.
  3. Disconnect the system from the electrical outlet, and disconnect the peripherals.
  4. Open the drive bays, remove all drives, and then close the drive bays.
  5. Remove the power supply units.
  6. Remove the system from the rack and place it on an ESD work bench. For more information, see the Rail Installation Guide available at https://www.dell.com/poweredgemanuals.
  7. Remove the system cover.
  8. Remove the following:
    CAUTION: Do not lift the system board by holding a memory module, processor, or other components.
    1. Air shroud
    2. Drive cage (rear) (if installed)
    3. All expansion cards and risers
    4. Internal PERC riser
    5. IDSDM/vFlash module
    6. Optional internal USB key (if installed)
    7. Processors and heat sink modules
    8. Processors blanks (if installed)
    9. Memory modules and memory module blanks
    10. LOM riser card

Steps

  1. Disconnect all cables from the system board.
  2. Using a Phillips #2 screwdriver, remove nine screws securing the system board to the chassis.
    Figure 1. System board screws
    This image shows screws for the system board.
  3. Hold the system board holder, slightly lift the system board, and then slide it toward the front of the chassis.
    CAUTION:To prevent damage to the processor socket when replacing a faulty system board, ensure that you cover the processor socket with the processor dust cover.
  4. Incline the system board at an angle, and lift the system board out of the chassis.
    CAUTION:Take care not to damage the system identification button while removing the system board from the chassis.
    Figure 2. Removing the system board
    This image shows how to remove the system board.

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