Replacing the system backplane in the 9043-MRX

To replace the system backplane, complete the steps in this 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. Install the new system backplane.
   1. Grasp the system backplane by the two side handles.
   2. Lower the system backplane into the chassis (1).
   3. Slide the system backplane towards the rear to engage the system backplane into the plugs at the rear of the chassis (2).
   4. Lower the system backplane into the four alignment pins at the bottom of the chassis (3).
   5. Ensure the system backplane is seated in the chassis.

      

   6. Using a 4 mm hex driver, tighten the eight screws that secure the system backplane to the chassis. Start with four screws in each corner of the system planar. Continue with the two screws in each of the two side channels next to the lift handles.

      

3. Remove all the socket dust covers from the system processor module sockets on the new system backplane.
   1. Grasp the latches on both sides of the socket dust cover and squeeze them inwards until the latches release from the pins on the system backplane.
   2. Lift the socket dust cover straight up.
   3. Install the dust cover in the old system backplane.

      

4. Install the system processor modules from the original system backplane in the new system backplane. Remove the system processor module from the tray.
   1. Ensure that the system processor module removal tool is in the open position. The top middle ring must be pushed down and top blue tabs must be turned inward.

      

   2. Lower the system processor module removal tool over the system processor module. Ensure that the tool aligns with the system processor module. Ensure that the guide pins are inserted into the alignment holes on each side of the system processor module removal tool.

      

   3. With the system processor module removal tool sitting on top of the system processor module, push down on the top ring slightly so that the blue tabs snap outward and the jaws engage with the system processor module.
      Make sure that both of the system processor module removal tool jaws are locked onto the system processor module by pushing down on the system processor module removal tool.

      Important: Do not press the blue release tabs until directed to do so later.
5. Place the system processor module in the system processor module socket on the system backplane.
   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.
   2. Hold the sides of the system processor module removal tool with system processor module and carefully lift the tool out of the system processor module tray.
   3. The system processor modules have different alignments.
      The two front system processor modules (locations C56 and C61) have the keyed location in the right rear of the socket. The two rear system processor modules (locations C14 and C19) are rotated 180 degrees and have the keyed location in the left front of the socket.

      

   4. Lower the system processor module removal tool and system processor module onto the socket. Align the tool with the socket. Align the guide pins of the socket with the alignment holes on each side of the system processor module removal tool. Use care to lower the system processor module removal tool evenly without tilting the tool.
      Note: Do not attempt to slide the system processor module removal tool or 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.

      

   5. Open the latches that hold the system processor module in the removal tool. Push down on the top ring while pressing in on the tabs.
   6. Lift the system processor module removal tool off the system processor module.
      Ensure that the system processor module is properly seated in the socket. The module corners should not overlap the socket edges.
6. Inspect the thermal interface material (TIM) for visible signs of damage such as folds or creases.

   

7. Choose one of the following repair options:

   Option	Description
   Is the TIM damaged?	It is damaged. Continue to step 8 to replace the TIM.
   Is the TIM not damaged?	It is not damaged and can be reused. Continue to step 10 to install the existing TIM.

8. Place a new TIM on the system processor module.
   1. Open the TIM packaging and carefully remove the TIM; grasp the TIM by the edges of the carrier strip and hold it away from the shipping container.
   2. Remove the protective film from the clear carrier strip 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. The TIM is rectangular; ensure that the TIM is properly oriented on the system processor module.

      

9. Continue with step 10.
10. Place the existing undamaged TIM on the system processor module.
    1. Using the tweezers, move the old processor's 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.

       

11. Place the heat sink on the TIM. Align the heat sink with the socket. Align the guide pins on the socket with the alignment holes in the heat sink.
    Pay attention to the air-flow labels on the heat sinks; the air flows from the front of the system to the back.
    Ensure that the side roller latches on the heat sink are in the lowest position. Make sure that they are not stuck in an upper position. Having the side roller latches in the lowest position helps to ensure that the socket latches connect properly.

    The system has two types of heat sinks.

    • The two front heat sinks (locations C56 and C61) have fewer fins than the two rear heat sinks (locations C14 and C19).
    • Do not accidentally put a rear heat sink in the front position, or put a front heat sink in the rear position.

    

    

12. Secure the heat sink to the socket of the system processor module.
    1. Ensure that the heat sink load arms are fully engaged with the heat sink so that they do not slip away from the heat sink.
    2. Tighten the center load screw clockwise using the supplied hex key until a firm stop is reached. If the heat sink moves noticeably, the load arms are not engaged. Unscrew the center load screw and repeat this step.

       

13. Using your labels, replace all of the voltage regulator modules into their proper locations: C12, C13, C15-C18, C20, C21, C54, C55, C57-C60, C62, and C63.
    1. With the levers in the open position, hold the voltage regulator module by its levers and lower the voltage regulator module into its slot in the system.
    2. Gently push the voltage regulator module into its connector.
    3. Rotate the levers in and press down on the latches to secure the voltage regulator module in its slot.
       Review the following animation for a demonstration of how to replace a voltage regulator module.

14. Replace the trusted platform module (TPM) card in location C96.
    1. With the levers in the open position, hold the TPM card by its levers and lower the voltage regulator module into its slot in the system.
    2. Gently push the TPM card into its connector.
    3. Rotate the levers in and press down on the latches to secure the TPM card in its slot.
       Review the following animation for a demonstration of how to replace the trusted platform module.

15. Using your labels, replace all of the memory modules into locations C22-C53, C64-C87, and C88-C95.
    1. Open the hinged memory module retainers.
    2. If the memory module is a DDR4 memory module, hold the memory module by the edges of the carrier and insert the memory module into the static discharge tool that is located between memory locations P0-C71 and P0-C72. Wait 5 seconds. Then, remove the memory module from the tool.
       Note: To determine whether a memory module is a DDR4 or DDR5 memory module, look at the service label on the memory module. While the DDR4 memory module service label does not always indicate the memory type, the DDR5 memory module service label always indicates that it is a DDR5 memory module.
       Review the following animation for a demonstration of how to discharge a memory module prior to installing it.

    3. Carefully insert the memory module into the slot by lining up the notch in the memory module with the keyed slot.
       Review the following animation for a demonstration of how to install a memory module.

    4. Rotate the hinged memory module retainer into the closed position. The retainer is locked when the latch clicks.
16. Replace the service access cover.
    1. Ensure that the release latches of the cover are in the open position.
    2. Lower the front of the cover onto the system unit at a downward angle so that the alignment pins at the front of the cover fit into the matching slots closest to the front of the chassis.
    3. Lower the rear of the cover so that the alignment pins closest to the rear of the cover fit into the matching slots closest to the rear of the chassis.
    4. Ensure that the cover alignment pins on each side of the cover fit into the matching slots in the chassis.

       

    5. Close the release latches by pushing them towards the front of the system until they click into place.

       

17. Place the system in the operating position.
    1. Unlock the blue rail safety latches by pushing them towards the front of the rail.
       Note: Some rails have safety latches that press inward rather than slide. For these rails, unlock the blue rail safety latches by pushing them inward.
    2. Push the system unit back into the rack until both release latches of the system unit lock into position. Ensure that any cables do not catch or bind as you push in the system.

    Note: Slide the system unit slowly into the rack to ensure that your fingers do not get caught in the side rails.

    

18. Replace the drive backplane into the front of the system in location P1.
    1. Ensure that the two hinged levers are in the open position.
    2. Grasp the drive backplane with two hands as indicated by the blue squares in the following animation. Push the drive backplane back into place.
    3. Ensure the pins on the sides of the backplane are fully seated in the slots of the chassis.
    4. Using both hands, push both hinged levers in until the tabs lock in place.
       Review the following animation for a demonstration of how to replace the drive backplane.

    5. Secure the drive backplane with the three recessed screws at the bottom of the backplane. Use a 4 mm ball-end hex driver (130 mm long) to tighten the screws. It takes about nine rotations to fully tighten these screws.
    6. Tighten the two captives screws on the sides of drive backplane.

       

19. Replace all the fans into the drive backplane in locations A0 through A3.
    1. Ensure that the fan latch is open.
    2. Hold on to the fan latch and using your hand to support the bottom of the fan, push the fan into its slot.
    3. Slide the fan latch to the right to lock the fan into its slot.
    4. Continue to push in against the latch with your thumb until the latch is fully seated.
    Review the following animation for a demonstration of how to install the fans.

20. Replace the control panel into location D0 and the control panel display into location D1 on the drive backplane.
    1. Install the control panel into the front of the system; push the control panel in until it clicks into place.
       Review the following animation for a demonstration of how to replace the control panel.

    2. Replace the control panel display into the front of the system. Push in the control panel display until it is fully seated in place.
       Review the following animation for a demonstration of how to replace the control panel display.

21. Using your labels, replace all of the drives into the drive backplane locations P0-C0 through P0-C9.
    1. Ensure the drive handle is in the open position.
    2. Slide the NVMe U.2 drive into the slot until it is fully seated.
    3. Close the drive handle to lock the NVMe U.2 drive in place.

       

22. Install or replace the front cover.
    1. Position the front cover on the front of the system, so that the four pins on the system match the four holes at the rear of the cover.
    2. Press the tabs on each side of the front cover to snap the front cover into position.
23. Replace the eBMC card assembly and all the adapters into the rear of the system.
    1. Align the cassette on the cassette rail in the cassette slot.
    2. Slide the cassette forward until the cassette is fully seated.
    3. To lock the cassette in its slot, squeeze the latch lever and rotate the latch up until it locks into place.

       Review the following animation for a demonstration of how to install the cassette.