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Remove the enclosure midplane

Use this information to remove the enclosure midplane.

About this task

disconnect all power
The power-control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.
  • Read the following sections to ensure that you work safely.
  • Follow the following steps to shut down the solution.

    1. Record the machine type model, the enclosure serial number, and retrieve the existing universally unique identifier (UUID) information from the enclosure midplane that you are removing. The procedure for obtaining this data might require different steps depending on the functional state of the enclosure.

      1. Log onto the Lenovo XClarity Controller and access the command-line interface (CLI). You can access the XCC CLI through a direct serial or Ethernet connection to the XCC, or through a Secure Shell (SSH) connection to the XCC. You must authenticate with the XCC before issuing commands.
      2. Query for the machine type model, enclosure serial number, and the UUID values by using the CLI info command. Record this information before you proceed.
    2. Enclosure is not operating:
      1. Obtain the enclosure serial number and the machine type model from one of the enclosure labels.
      2. Record the enclosure serial number, the machine type model, and the UUID before you proceed.
  • Shut down the operating system and turn off any compute nodes in the enclosure. See the documentation that comes with the compute node for detailed instructions.

  • Disconnect all external cables from the enclosure.
    Use extra forces to disconnect QSFP cables if they are connected to the solution.


  1. Make preparations for this task.
    1. Remove all trays in the front of the enclosure (see Remove a DWC tray from the enclosure).
    2. Remove all EMC shields on both sides.
      Figure 1. Upper EMC shields removal
      Upper EMC shields removal
      Figure 2. Lower EMC shields removal
      Lower EMC shields removal
    3. ❶ Push the latch up upwards and ❷ slide the drip sensor assembly backwards, then; lift the drip sensor assembly up to clear sensor post and pull it out of the enclosure.
      Figure 3. Drip sensor assembly removal
      Drip sensor assembly removal
    4. Remove manifold retention brackets that are retaining manifolds (top enclosure position only).
      Figure 4. Retention bracket removal
      Retention bracket removal
    5. Remove the SMM2 and the SMM2 support bracket.
      Figure 5. SMM2 removal
      SMM2 removal
      Figure 6. SMM2 support bracket removal
      SMM2 support bracket removal
    6. Remove the blank filler.
      Figure 7. Blank filler removal
      Blank filler removal
    7. Remove all power supplies from the enclosure.
      Figure 8. Power supply removal
      Power supply removal
    8. Remove eight screws (using the screwdriver contained in the manifold repair kit) to loosen two manifolds from the enclosure.
      Figure 9. Manifold screw locations
      Manifold screw locations
      Table 1. Manifold screw locations
      1 Screws2 Manifold
    9. Remove eight screws to remove two support brackets on both sides.
      Figure 10. Support bracket removal
      Support bracket removal
    10. Remove the two EIA covers from the front of the enclosure, then, remove the six screws that secure the enclosure to the rack.
      Figure 11. EIA cover removal
      EIA cover removal
    11. Slide the enclosure out until it allows you to attach front handles at both sides. Align slots on the handles with posts on the enclosure and slide handles up until them lock into places.
      Three trained technicians are required to complete the enclosure installation/removal task.
      • Two technicians must hold the front and rear handles at both sides of the enclosure.

      • One technician must protect the cables from damage.

      Figure 12. Sliding the enclosure
      Sliding the enclosure
      Figure 13. Installing the front handle
      Front handle installation
    12. Hold the front handles at both sides, and slide the enclose out until there is enough space to install the rear handles.
      Figure 14. Rear handle installation
      Rear handle installation
    13. Carefully hold front and rear handles at both sides to slide the enclosure out of the rack; then, gently put the enclosure on a stable work surface.
  2. Remove the top cover.
    1. ❶ Loosen the three captive screws on the top cover.
    2. ❷ Rotate the top cover outwards.
    Figure 15. Top cover outward rotation
    Top cover outward rotation
  3. Remove the enclosure midplane from an enclosure.
    1. ❶ Unplug two cables on the enclosure midplane.
      Make sure that you do not grasp the connectors on the enclosure midplane. You could damage the connectors.
    2. ❷ Loosen two screws that secure the enclosure midplane to the enclosure.
    3. ❸ Carefully grasp the enclosure midplane and slide it away from the enclosure.
    Figure 16. Removal of the enclosure midplane from an enclosure
    Removal of the enclosure midplane from an enclosure

After you finish

If you are instructed to return the component or optional device, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.

Demo video

Watch the procedure on YouTube