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Remove the system board assembly

See this topic to learn how to remove the system board assembly. This procedure must be executed by a trained technician.

About this task

  • Removing and installing this component requires trained technicians that are certified by Lenovo Service. Do no attempt to remove or install it without proper training and qualification.
  • Go over Installation Guidelines to ensure that you work with safety.

  • Turn off the server and peripheral devices and disconnect the power cords and all external cables (see Power off the server).

  • If the server is installed in a rack, slide the server out on its rack slide rails to gain access to the top cover, or remove the server from the rack.


  1. Make preparations for this task.
    1. If applicable, remove the security bezel (see Remove the security bezel).

    2. Remove the top covers (see Remove the top covers).

    3. Remove the air baffle (see Remove the air baffle).

    4. Remove the fan cage assembly (see Remove the fan cage assembly).

    5. Remove both PCIe riser assemblies (see Remove the PCIe riser assemblies and adapters).

    6. Remove the M.2 boot adapter (see Remove the M.2 boot adapter and drives).

    7. Remove the OCP adapter (see Remove the OCP Ethernet adapter).

    8. Remove both power supply units (see Remove a hot-swap power supply unit).

    9. Remove the power backplane (see Remove the power backplane).

    10. Remove the intrusion switch cable (see Remove the intrusion switch with cable).

    11. Remove all the memory modules (see Remove a memory module).

    12. Remove the Root of Trust Module (see Remove the Firmware and Root of Trust/TPM 2.0 Security Module).

    13. Remove the processor and heat sink (see Remove the processor and heat sink).

    14. Disconnect all the cables from the system board.

  2. Pull the plunger up; then, hold the plunger and the handle, and slide the system board slightly forward to disengage it from the chassis.
    Figure 1. Disengaging the system board

  3. Rotate the right end of the system board up to remove the system board from the chassis.
    Figure 2. Removing the system board

After this task is completed

  • Install a replacement unit (see Install the system board assembly).
  • If there is a plan of recycle, remove the screws as marked in the following illustration, and separate the supporting sheet from the system board.
    Figure 3. Recycling the system board

Watch the procedure on YouTube