Replacing the system processor module in the 9105-41B, 9105-42A, or 9786-42H system

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

Procedure

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.
Remove the system processor module from the shipping package using the system processor module removal tool.
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.
  
  Figure 1. Ensuring that the system processor module removal tool is in the open position
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.
  
  Figure 2. Lowering the removal tool onto the system processor module
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.
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. 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.
  
  Figure 3. Installing the system processor module
4. 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.
5. 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.
Inspect the thermal interface material (TIM) for visible signs of damage such as folds or creases.

Figure 4. Inspecting the thermal interface material

Choose one of the following repair options:

Option	Description
Is the TIM damaged?	The TIM is damaged. Continue to step 6 to replace the TIM and install the existing heat sink.
Is the TIM not damaged?	The TIM is not damaged and can be reused. Continue to step 8 to move the TIM and install the existing heat sink.

Place a new TIM on the system processor and reuse the existing heat sink.
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.
  
  Figure 5. Placing a new TIM onto the system processor module
4. 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.
  
  Figure 6. Installing the heat sink on the TIM
Skip to step 9.
Place the existing undamaged TIM on the system processor and reuse the existing heat sink.
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.
  Figure 7. Moving the TIM onto the system processor module
2. 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.
  
  Figure 8. Installing the heat sink on the TIM
Secure the TIM and 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.
  
  Figure 9. Tightening the center load screw on the heat sink
Lightly grip the replaced system processor module by the edges and lift it off of the packaging cover. Align the module in the packaging base and place it in the package base. Close the packaging cover.