Remove the model 9116-561 and 570 system processor assembly

You might need to remove the system processor assembly. Use the procedure in this section to perform this task.

1. Perform prerequisite tasks as described in Before you begin.
2. If necessary, identify the system processor assembly that you need to replace. Refer to Identify a failing part.
3. Stop the system or logical partition.
4. Open the front rack door if present.
5. 
   Remove the front cover from the model 9116-561 or 570.
   Attention:

   • Attach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic discharge from damaging your hardware.
   • When using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
   • If you do not have a wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.
6. Disconnect the SMP processor cable from a system unit.
7. As shown in the following figure, loosen the locking knobs A of the SMP cable latch to the unlocked position. Pull the SMP cable latch B down and lift away C from the system processor assembly.
   
   Figure 1. Removing the SMP cable latch
8. Remove the model 9116-561 or 570 control panel.
9. Remove the model 9116-561 or 570 voltage regulator assembly.
10. Record the location of each voltage regulator assembly being removed. As shown in Figure 2, rotate the lever to the left and out from the system A to unlock the system backplane assembly, and then pull it out of the system using both hands B.
    CAUTION:
    The backplane assembly is of substantial weight. Do not pull the backplane assembly out using the blue lever. Grasp the backplane assembly firmly with both hands when it is free of the system.
    Figure 2. Removing the system backplane assembly

    
11. Place the system backplane assembly on an acceptable electrostatic discharge (ESD) surface.
12. 
    If you are removing the processor backplane because of a system failure, identify the failing processor location by looking at the LEDs C located on the top of the processor card assembly.

    If you used the service action log, Advanced System Management Interface (ASMI), or HMC to activate the identify function prior to removing the processor backplane, identify the failing processor card by illuminating the LEDs located on the top of the processor card assembly. To illuminate the location LED for the failing processor, press the LED actuator button A located on the right side of the assembly as shown in the following figure.

    Attention: You must press the actuator button soon after the system backplane assembly is removed from the system. The assembly retains the energy to light the LEDs only for a short period of time after the assembly is disconnected from the system power source.
    
    Figure 3. LED actuator button
13. 
    Pull the locking knobs A out to the unlocked position as shown in Figure 4. Push the locking arms B down and out to unlock the system processor assembly, and then lift it out of the system backplane assembly C.
    Figure 4. Removing the system processor assembly

    
14. Remove the memory modules to reinstall them in the new system processor assembly. Refer to Remove and replace model 9116-561 or 570 memory modules.
15. Place the system processor assembly on an acceptable electrostatic discharge (ESD) surface.