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Dell EMC PowerEdge MX740c 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 You may find the CMOS battery loss or CMOS checksum error displayed during the first instance of powering on the system after the processor or system board replacement which is expected. To fix this, go to setup option to configure the system settings.
NOTE It is required to reactivate the licenses after the system board replacement.
CAUTION If either the system board or iDRAC card fails, it is required to replace the system board and iDRAC card at the same time.
CAUTION Do not attempt to remove the TPM plug-in module from the system board. After 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 reinstalled or installed on another system board.
  1. Follow the safety guidelines listed in Safety instructions.
  2. Follow the procedure listed in Before working inside your sled.

  3. Remove the following:

    1. Air shroud

    2. Memory modules

    3. Processor(s) and heat sink(s)

    4. Drives

    5. Drive backplane

    6. Drive cage

    7. PERC card

    8. IDSDM

    9. Mezzanine card

    10. Mini Mezzanine card

    11. iDRAC card

    12. Internal USB key

WARNING The processor and heat sink can become hot. Be sure that the processor has had sufficient time to cool before handling.
WARNING The memory modules are hot to touch for some time after the system has been powered down. Allow time for the memory modules to cool before handling them. Handle the memory modules by the card edges and avoid touching the components.
CAUTION Do not lift the system board by holding a memory module, processor, or other components.
CAUTION Temporarily label the drives before removal so that you can replace them back in their respective slots.

Steps

  1. Disconnect all cables from the system board.
  2. Using the Phillips #2 screwdriver, remove all the screws that secure the system board to the chassis.
  3. Holding the edges, lift the system board out of the system.
    Figure 1. Removing the system board
    This image shows removing the system board.

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