Remove a system board

Use this information to remove a system board.

S001
shock hazard
DANGER
Electrical current from power, telephone, and communication cables is hazardous.

To avoid a shock hazard:

  • Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.
  • Connect all power cords to a properly wired and grounded electrical outlet.
  • Connect to properly wired outlets any equipment that will be attached to this product.
  • When possible, use one hand only to connect or disconnect signal cables.
  • Never turn on any equipment when there is evidence of fire, water, or structural damage.
  • Disconnect the attached power cords, telecommunications systems, networks, and modems before you open the device covers, unless instructed otherwise in the installation and configuration procedures.
  • Connect and disconnect cables as described in the following table when installing, moving, or opening covers on this product or attached devices.
To Connect: To Disconnect:
  1. Turn everything OFF.
  2. First, attach all cables to devices.
  3. Attach signal cables to connectors.
  4. Attach power cords to outlet.
  5. Turn device ON.
  1. Turn everything OFF.
  2. First, remove power cords from outlet.
  3. Remove signal cables from connectors.
  4. Remove all cables from devices.
Attention: To avoid damaging the water loop, always use the water loop carrier when removing, installing or folding the water loop.
Before you remove a system board:
  1. Read the following section(s) to ensure that you work safely.
  2. Turn off the corresponding DWC tray that you are going to perform the task on.

  3. Remove the tray (see Remove a DWC tray from the enclosure).

  4. Remove the tray cover (see Remove the tray cover).

  5. Remove both air baffles.

    Figure 1. Air baffle removal
    Air baffle removal
  6. Remove the front and the rear cross braces (10x P2 screws).

    Figure 2. Cross brace removal
    Cross brace removal
  7. Remove all four DIMM covers and DIMMs for both nodes (see Remove a DIMM).

  8. Remove M.2 Backplanes from both nodes (see Remove the M.2 backplane).

  9. Remove drive cage assemblies from the node (see Remove a drive cage assembly).

  10. Remove PCIe riser assemblies from the node if applicable (see Remove an adapter or Remove an Internal Faceplate Transition (IFT) adapter depending on your configuration).

  11. Fold the water loop.

    1. Orient the water loop carrier with two M.2 backplane guide pins; then, gently put the water loop carrier down and ensure it is seated firmly on the water loop.

      Figure 3. Water loop carrier installation
      Water loop carrier installation
    2. Remove water loop screws (15x silver Torx T10 screws per node).

      Figure 4. Silver T10 screw removal
      Silver T10 screw removal
    3. Fully loosen all Torx T30 captive fasteners (8x Torx T30 captive fasteners per node) on cold plates in the removal sequence shown on the cold plate label.

      Attention: To prevent damage to components, make sure that you follow the indicated loosening sequence.
      Figure 5. Loosening Torx T30 captive fasteners
      Loosening Torx T30 captive fasteners
    4. Tighten water loop carrier screws (10x P2 screws per node).

      Figure 6. Tightening captive P2 screws
      Tightening captive P2 screws
    5. Fold the water loop.
      1. Carefully lift the water loop up off the system board, then unhook the quick connect from the four alignment posts and slide the quick connect out of the opening in the rear of the tray.

      2. Carefully rotate the water loop so one half is sitting on top of the other half.

      Figure 7. Folding the water loop
      Folding the water loop
  12. Remove the power distribution board (see Remove the power distribution board).

  13. Remove the blank bezel filler.

    Figure 8. Blank bezel filler removal
    Blank bezel filler removal

Complete the following steps to remove a system board.

Watch the procedure. A video of the installation process is available:

  1. Remove the following screws.
    • Eight black Torx T10 screws per node on the system board.

    • Two 3/16" hex head screws at the front of the node.

      Note: Use a 3/16" hex head driver to ensure proper removal.
    Figure 9. Screws removal
    Screws removal
  2. Remove the system board.
    1. Carefully hold the front Ethernet connector and tilt the system board with an angle.
    2. Gently slide the system board backward.
    3. Carefully lift and remove the system board from the node.
    Note: When you remove the system board from the node, avoid touching the connectors on the system board. Be careful not to damage any surrounding components inside the node.
    Figure 10. System board removal
    System board removal

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.

Important:
Before you return the system board, make sure that you install the CPU socket dust covers from the new system board. To replace a CPU socket dust cover:
  1. Take a dust cover from the CPU socket assembly on the new system board and orient it correctly above the CPU socket assembly on the removed system board.

  2. Gently press down the dust cover legs to the CPU socket assembly, pressing on the edges to avoid damage to the socket pins. You might hear a click on the dust cover is securely attached.

  3. Make sure that the dust cover is securely attached to the CPU socket assembly.