Install the model 55x or OpenPower 720 system processor assembly

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

If your system is managed by the Hardware Management Console (HMC), you can use the HMC to complete the steps for installing a system processor assembly. For instructions, see Install a feature using the Hardware Management Console.

The following procedure describes the installation of an additional system processor assembly. If you are upgrading the system processor by replacing an existing system processor assembly, refer to Model 55x or OpenPower 720 system processor assembly.

Attention: Adding the second system processor assembly requires that the system be powered by 220 V ac. If your system is not currently installed with 220 V ac input, contact your IBM® reseller to obtain the correct power features.

To install the system processor assembly, do the following:

Perform the prerequisite tasks listed in Before you begin.
Stop the system or logical partition.
Disconnect the power cables from the primary power supply and secondary power supply if present.
If you have a rack-mounted system, open the front rack door.
If you have a rack-mounted system, place it in the service position. Refer to Place the rack-mounted system or expansion unit in the service position.
Remove the service access cover. Refer to Remove the service access cover from the model 285, 51x, 52x, 55x, 710, or OpenPower 720.
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.
Remove the system processor filler. Refer to Remove the model 55x or OpenPower 720 system processor assembly.
Install the new voltage regulator. Refer to Install a model 550, 550Q, or OpenPower® 720 voltage regulator module.
Add memory to the new system processor assembly. Refer to Install model 550, 550Q, or OpenPower 720 memory modules.
Restriction: If additional memory was not ordered, you might have to move memory from the other processor.
With the latches A in the unlocked position (shown in Figure 1 or Figure 2), correctly align the system processor assembly B and slide it through the guide rails into the system backplane assembly.
Figure 1. Installing the rack-mounted system processor assembly into the backplane assembly

Figure 2. Installing the stand-alone system processor assembly into the backplane assembly
Use the latches C to lock the assembly into position.
Replace the service access cover. Refer to Install the service access cover on the model 285, 51x, 52x, 55x, 710, or OpenPower 720.
If you have a rack-mounted system, place it in the operating position. Refer to Place the rack-mounted system or expansion unit in the operating position.
The server now requires 220 V ac input power to operate. If new power cables were part of this order, replace the existing power cables.
Restore power to the system by reconnecting the system power cables.
Start the system or logical partition.
Verify that the system processor assembly is functional. Refer to Verify the installed part.