Replacing the system backplane in the 8335-GTW

To replace a system backplane, complete the steps in this procedure.

Procedure

  1. Ensure that you have the electrostatic discharge (ESD) wrist strap on and that the ESD clip is plugged into a ground jack or connected to an unpainted metal surface. If not, do so now.
  2. Remove the replacement system backplane from the static-protective package and place it on an ESD mat.
  3. Using the blue handles (A), lower the system backplane (B) into the system.
    Figure 1. Lowering the system backplane into the system
    Lowering the system backplane into the system
  4. Replace the three metal pipe supports at (B) (two smaller supports) and (C) (one longer support). Align and tighten the 22 screws into the system backplane at (A) and into the pipe supports at (B) and (C).
    The screw locations are shown in Figure 2. The screws at (A) are the shortest. The screws at (B) and (C) are longer and secure the pipe supports.
    Figure 2. System backplane screw locations
    System backplane screw locations
  5. Ensure that the jumper shown in Figure 3 is set to the water cooled position.
    Figure 3. Jumper in water-cooled position
    Jumper in water-cooled position
  6. Replace one screw (B) on each side of the middle support (A).
    See Figure 4.
    Figure 4. Replacing the middle support screws
    Replacing the middle support screws
  7. Transfer the GPUs from the old system backplane to the new system backplane. Ensure that you use new TIMs on each of the GPUs.
    For instructions, see Replacing the graphics processing unit in a water-cooled 8335-GTW or 8335-GTX system.
  8. On the new system backplane, remove the socket cover from a system processor socket.
  9. Prepare the system processor module for installation:
    1. Open the latches that hold the system processor module in the supplied removal tool (A). Push down on the ring (B) while pressing in on the tabs (C).
      See Figure 5.
      Figure 5. Opening the processor removal tool latches
      Opening the processor removal tool latches
    2. Lower the tool over the system processor module while ensuring that the two guide pins (A) insert into the alignment holes (B) on each side of the tool.
      See Figure 6.
      Figure 6. Lowering the removal tool onto the system processor module
      Lowering the removal tool onto the system processor module
    3. With the removal tool sitting on top of the system processor module, push down on the ring (A) to close the latches (C) and lock the system processor module into the tool. Make sure that both of the tool jaws are locked on the system processor module.
      See Figure 7.
      Figure 7. Locking the system processor module into the tool
      Locking the system processor module into the tool
  10. Hold the sides of the tool with system processor module and carefully lift the tool out of the system processor module tray.
  11. Install the system processor module:
    1. If dust or debris is present on the system processor socket, use the supplied air pump to clean the socket. Blow small bursts of air from the center toward the sides of the socket, as shown in Figure 8.
      Figure 8. Removing dust and debris from the system processor socket
      Removing dust and debris from the system processor socket
    2. Lower the tool and system processor module onto the socket. Align the guide pins (A) with the alignment holes (B) on each side of the tool. Use care to lower the tool evenly without tilting the tool.
      See Figure 9.
      Note: Do not attempt to slide the tool and the system processor module in any direction while the system processor module is touching the socket. If the tool and the system processor module are not aligned with the guide pins, lift the tool and the system processor module and reposition them.
      Figure 9. Installing the system processor module
      Installing the system processor module
    3. Open the latches that hold the system processor module in the supplied removal tool (A). Push down on the ring (B) while pressing in on the tabs (C).
      See Figure 10.
      Figure 10. Removing the system processor module tool
      Removing the system processor module tool
    4. Lift the tool off the system processor module.
  12. Inspect the thermal interface material (TIM) for visible signs of damage, as shown in Figure 11. If you see folds, tears, bends, or if you have doubts about the TIM, replace it.
    Figure 11. Inspecting the thermal interface material
    Inspecting the thermal interface material
  13. Choose one of the following repair options:
    Option Description
    Is the TIM damaged? It is damaged. Proceed to step 14 to replace the TIM and install the cold plate.
    Is the TIM OK? It is not damaged and can be reused. Proceed to step 15 to move the TIM and install the cold plate.
  14. Use this step to install a new TIM and reuse the existing heat sink.
    1. Open the TIM packaging and carefully remove the TIM, holding it by the edges of the carrier strip and holding it away from the shipping container.
    2. Remove the protective film from the clear carrier strip by using the supplied tweezers.
      Note: The TIM must remain flat. Small wrinkles are acceptable, but folds are not acceptable.
    3. Using the tweezers, remove the TIM from the carrier strip and center it onto the system processor module.
      The TIM has no preferred up side. The TIM can be placed on the system processor module and centered as shown in Figure 12.
      Figure 12. Installing a new TIM onto the system processor module
      Installing a new TIM onto the system processor module

    Continue with step 16.

  15. Use this step to reuse the existing undamaged TIM and heat sink.
    1. Using the tweezers, move the old TIM from the clean, dry surface and center it onto the new system processor module.
      The TIM has no preferred up side. The TIM can be placed on the system processor module and centered as shown in Figure 13.
      Figure 13. Replacing the TIM onto the system processor module
      Replacing the TIM onto the system processor module
  16. Replace the cold plates.
    For instructions, see Replacing the cold plates in the 8335-GTW or 8335-GTX system.
  17. Using your labels, replace the power switch and cable into that connector in the system backplane.
    For instructions, see Replacing the power switch and cable in the 8335-GTW system.
  18. Using your labels, replace the fan power cable into that connector in the power distribution card.
    For instructions, see Replacing the fan power cable in the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system.
  19. Using your labels, replace the disk and fan signal cable into that connector in the system backplane.
    For instructions, see Replacing the disk and fan signal cable in the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system.
  20. Using your labels, replace the PCIe adapters.
    For instructions, see Replacing a PCIe adapter in the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system.
  21. Replace the BMC card.
    For instructions, see Replacing the BMC card in the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system.
  22. Transfer the memory modules from the old system backplane to the new system backplane.
    For instructions, see Removing and replacing memory modules in the 8335-GTW or 8335-GTX system.
  23. Replace the air baffles (A) and (B) as shown in Figure 14.
    Carefully move the baffles around the hoses.
    Figure 14. Replacing the memory air baffles
    Replacing the memory air baffles