Replacing the system backplane in the 8408-44E or 8408-E8E

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

Procedure

Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
Replace the backplane into the system.
Attention: Carefully remove the replacement system backplane from the ESD bag it is shipped in. To lift the FRU from the packaging, hold the sides of the system backplane. Do not lift the FRU from the packaging by holding the top or the bottom of the system backplane. Refer to the instructions that were shipped with this FRU.
1. Lower the system backplane into the system by using the handles on the side of the backplane as shown in Figure 1.
  Figure 1. Replacing the system backplane
2. Lower the handles (A). See Figure 2.
3. Lower the hinged brackets (B) and tighten the thumbscrews.
  Figure 2. Replacing the system backplane
4. Tighten the four captive screws (A) of the system backplane by using a 4 mm Allen wrench. See Figure 3.
  Figure 3. Tightening the system backplane screws
Label and remove the processor heat sinks from the original system backplane.
Note: The processor heat sink must be replaced onto the same processor from which it was removed.
1. Put on a pair of the supplied Nitrile gloves. You must wear Nitrile gloves (part number 00RY410) when you handle the system processor module, thermal interface material (TIM), and the heat sink.
2. Loosen the load arm screw (A) of the system processor heat sink (B) that you are removing with the supplied T-handle T20 Torx driver (part number 00LR425). The load arm pivots up in the direction that is shown in Figure 4.
  Figure 4. Loosening the load arm screw of the heat sink
3. Inspect the heat sink for any dust or debris on it. If you must remove dust or debris from the heat sink, it must be done in another room or greater than 25 feet (7.62 meters) away from the work area.
4. Place heat sink upside down on the ESD mat.
5. Remove dust and debris from the system processor module area.
  Note: If dust or debris is present, use the supplied air pump (part number 45D2645) to clean the system processor module area. If your air pump is not assembled as shown in Figure 5, fasten the tip onto the bulb. Blow small bursts of air from the center toward the sides of the system processor module as shown in Figure 5.
6. Repeat step 3 for the remaining heat sinks.
Figure 5. Cleaning the system processor module area
Remove the system processor socket covers from the replacement system backplane.
1. Grasp the socket cover tabs with the supplied cover removal tool (part number 00FX605). Squeeze the removal tool handles. Then, lift the cover straight up. See Figure 6.
2. Repeat step 4 for the remaining covers.
Figure 6. Removing the system processor socket cover
Replace the processor modules and heat sinks.
1. Ensure that you are wearing a pair of the supplied Nitrile gloves. You must wear Nitrile gloves (part number 00RY410) when you handle the system processor module, thermal interface material (TIM), and heat sink.
2. Lower the supplied removal tool (part number 00FW771) onto the system processor module in the original system backplane. The beveled corner (A) of the tool must align with the beveled corner of the system processor module. Align the tabs (B) of the tool with the pins (C) of the processor socket. See Figure 7.
  Figure 7. Lowering the removal tool onto the system processor module
3. Push down on the tool at the locations that are indicated by the arrows to lock the system processor module into the removal tool. See Figure 8. Do not press the blue release tabs until directed to do so later.
  Note: The tool drops slightly when you push down so that the jaws can grab the bottom of the system processor module.
  
  Figure 8. Locking the replacement system processor module in the removal tool
4. Grasp the sides of the tool and system processor module and carefully lift it slightly out of the original system backplane. Then, turn it over so that the system processor module side is up. Ensure that both tool jaws (A) are firmly grabbing the system processor module, as shown in Figure 9.
  Note: If both jaws are not firmly grabbing the system processor module, press down on the corner of the system processor module closest to the jaw until it locks into place. Do not touch any part of the system processor module other than the corners.
  
  Figure 9. Ensuring that the system processor module is securely locked in tool
5. Lower the tool and system processor module onto the socket in the replacement system backplane. Ensure that the two guide pins are inserted into the alignment holes on each side of the tool, as shown in Figure 10.
  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 10. Lowering the system processor module onto the socket
6. After the system processor module is properly aligned, squeeze and hold the two blue release tabs (A) together until a firm stop is reached, as shown in Figure 11. Then, lift the tool off the system processor module.
  Figure 11. Removing the system processor module tool
7. Inspect the thermal interface material (TIM) for visible signs of damage, as shown in Figure 12.
  Note: When the heat sink is removed from the system processor module, the TIM should be adhered to the heat sink. Unless damaged, the TIM that is adhered to the heat sink can be reused. Replace the TIM if the TIM is damaged. Do not reuse the removed heat sink if the TIM is damaged. Either discard the heat sink and the damaged TIM locally or return them to IBM® based on part-order-form part status. It is recommended that a spare TIM and heat sink, (part number 00LR426), be on hand before you replace the system processor module.
  
  Figure 12. Inspecting the thermal interface material
8. Are you replacing the TIM or heat sink?
  Yes:
  
  Continue with step 5.i.
  
  No:
  
  Go to step 5.n.
9. If the TIM or heat sink must be replaced, order TIM and heat sink, (part number 00LR426).
10. 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.
11. Remove the protective film from the clear carrier strip by using the supplied tweezers, part number 15R8943.
  Note: The TIM must remain flat. Small wrinkles are acceptable, but folds are not acceptable.
12. Align one of the two 45-degree chamfers of the TIM with the processor module chamfer (A) as shown in Figure 13.
  Note: The red stripe on the TIM must be facing up.
13. Center the TIM onto the processor module.
  Figure 13. Replacing the thermal interface material
14. Clean the heat sink bottom surface with the lint-free cloth that is supplied in the glove kit.
15. Replace the heat sink onto its original processor. Lower the heat sink over the system processor module, ensuring that the holes in the heat sink (A) align with the two guide pins (B) on the socket, as shown in Figure 14.
  Figure 14. Replacing the heat sink
16. Move the load arm into position over the heat sink and tighten the load arm screw (A) with the supplied T-handle T20 Torx driver part number 00LR425, as shown in Figure 15.
  Note: Do not overtighten the load arm screw.
  
  Figure 15. Tightening the load arm screw
17. Repeat step 5 for the remaining system processors and heat sinks.
Replace the memory.
1. Label and remove the memory from the original system backplane.
2. To unlock the memory from its connector in the slot, push the locking tabs (A) in the direction that is shown in Figure 16.
3. The lever action of the tabs forces the memory out of the connector. Hold the memory by the edges and pull it out of the system.
  Figure 16. Removing memory from the system
4. Replace the memory into the replacement system backplane.
5. Grasp the memory along its edges and align it with the slot.
  Attention: Memory is keyed to prevent it from being installed incorrectly. Note the location of the key tab within the memory connector before you attempt to install the memory.
6. Press the memory firmly into the slot until the locking tab (A) locks in place. See Figure 17.
  Figure 17. Replacing memory
7. Repeat step 6 for the remaining memory.
Replace the processor voltage regulator modules (VRM).
1. Label and remove the processor voltage regulator modules from the original system backplane.
2. Pull the connector tabs (A) up and then out, as shown in Figure 18.
3. Pull the processor voltage regulator module out of the connector.
  Figure 18. Removing the processor voltage regulator module
4. Replace the voltage regulator modules into the replacement system backplane.
5. Ensure that the connector tabs (A) are pushed out to the unlocked position, as shown in Figure 19.
6. Carefully grasp the processor voltage regulator module along the edges and align it with the connector.
7. Insert the processor voltage regulator module into the connector.
8. Secure the processor voltage regulator module by pushing in the connector tabs (A) until it is secured to the system's chassis, as shown in Figure 19.
  Figure 19. Installing the processor voltage regulator module
9. Repeat step 7 for the remaining processor voltage regulators.
Replace the memory voltage regulator modules if present.
1. Label and remove the memory voltage regulator modules from the original system backplane.
2. Pull out the memory voltage regulator modules from the slots by holding the blue tabs (A) and by supporting the bottom of the cards, as shown in Figure 20.
  Figure 20. Removing the memory voltage regulator modules
3. Replace the memory voltage regulator modules into the replacement system backplane.
4. Place the memory voltage regulator modules into the connectors of the system backplane, as shown in Figure 21.
5. Press down the memory voltage regulator modules till they are firmly in place.
  Note: While replacing the memory voltage regulator module, ensure that the green tab (A) is on the side of the VRM that is closest to the front of the system. This check ensures that the orientation of the VRM in the system is correct.
  
  Figure 21. Installing the memory voltage regulator modules
Replace the front fans into their original positions.
1. Ensure that the fan handle (A) is rotated open as shown in Figure 22.
2. Using your hand to support the bottom of the fan, align the fan with the fan slot and slide it into the system.
3. Rotate the fan handle (A) in the direction that is shown and then press the fan handle until the latch locks in place. See Figure 22.
4. Repeat step 9 for the remaining front fans.
Figure 22. Replacing the front fan

Last updated: Tue, November 27, 2018