Removing and replacing the system backplane in a model 9113-550, 9133-55A, 9406-550, and OpenPower 720

Learn how to remove and replace the system backplane in a model 9113-550,9133-55A, 9406-550, and OpenPower® 720.

If you are planning to use this information in printed form, be sure to print all of the information you need. You can find all of the information, in both HTML or PDF format, in the Installing features and parts topic.

Before performing the following procedures, read the System Safety Inspection.

Attention: If you are servicing a rack-mounted system unit, it is strongly recommended that the system drawer be removed from the rack. If you are servicing a stand-alone system unit, it is strongly recommended that the system be placed on its side, on a flat and stable surface. To avoid potential breakage, the system front foot must not be resting on the surface.

Attention: Before you remove or disconnect any components, note where they are connected or installed in the system.

Note: When you replace the system backplane assembly or time-of-day battery, you will lose the service processor settings.

Check and record the following service processor settings:

System name setting. Refer to Changing system name.
System power settings. Refer to Controlling the system power.
ASMI service aids settings. Refer to Troubleshooting the system using system service aids.
System configuration settings. Refer to Changing system configuration.
Network services settings. Refer to Configuring network services.
Login profile settings. Refer to Setting up login profile.
Processing unit power control network identifier. Refer to Changing processing unit power control network identifier.
Server firmware. Refer to Server firmware fixes. The system may need to be updated to the latest server firmware code level after you replace the service processor.
Also service processor settings that may have been set using operating system commands.

If you are removing the system backplane as part of another procedure, continue to the next step. If you are removing the system backplane because it is not operational, verify that it is the failing part. See Identify a failing part.
Perform the following to prepare the system:
1. Ensure that the customer has taken appropriate actions to remove the server from normal use.
2. Power off the system. For instructions, see Stopping the system.
3. Disconnect the power source from the system.
  Note: This system might be equipped with a second power supply. Before continuing with this procedure, ensure that the power source to the system has been completely disconnected.
4. Attach a wrist strap to a metal surface of your hardware to prevent electrostatic discharge from damaging your hardware. If you do not have a wrist strap, touch a metal surface of the system before installing or replacing hardware.
  Note: Follow the same precautions that you would use if you were not using the wrist strap. A wrist strap is for static control. It will not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
Remove the front cover. For instructions, see Remove the front cover.
Label and disconnect all other cables located at the rear of the system.
Place the system in the service position. For instructions, see Place the unit in the service position.
Remove the service access cover. For instructions, see Remove the service access cover.
Remove the media-device enclosure. For instructions, see Remove the media-device enclosure.
Note: If there is a cable from the media-device enclosure to the control panel, unplug the cable as you remove the control panel from the media-device enclosure.
Remove the RAID enablement card, if present. For instructions, see Remove the RAID enablement card.
Record the slot number and location of each disk drive that is installed in the server.
Remove the disk drives. For instructions, see Remove a disk drive.
Remove the disk drive backplanes (see Replace a disk drive backplane).
Remove the fans. For instructions, see Remove the fans.
Record the slot number and location of each adapter that is installed in the server.
Remove the PCI adapters. For instructions, see Remove the PCI adapter with the system power off.
Remove the PCI adapter dividers. For instructions, see Remove a PCI adapter.
Remove both power supplies, if two are present in the system, or remove the power supply and filler. For instructions, see Remove the power supply.
Remove both processor assemblies, if two are present in the system, or remove the processor assembly and filler. For instructions, see Remove the processor assembly.
Remove the voltage regulator module. For instructions, see Remove the voltage regulator module.
Remove the processor and power supply dividers.
Remove the screws holding the front support bracket.
Remove the front support bracket.
Remove the VPD card. For instructions, see Remove the VPD card.
Remove the time-of-day battery. For instructions, see Remove the time-of-day battery.
Remove the screws holding the rear support bracket.
Remove the rear support bracket.
Remove the PCI adapter insulator sheet, power supply insulator sheet, and system insulator sheet.
To remove the system backplane and mounting plate from the chassis, lift the front edge of the system backplane and mounting plate until it clears the locating pins, then pull it towards the front of the system. Lift the system backplane and mounting plate up and out of the system chassis.
Remove the screws holding the system backplane to the mounting plate.
To replace the backplane, reverse the steps in the removal procedure.
Do not start the system at this time. You will be instructed when to start the system in the procedure to restore service processor settings that follows.
After you replace the system backplane assembly, do the following to restore service processor and SPCN settings.
1. Enable network access to the service processor by doing one of the following.
  - If the network connection uses the Dynamic Host Configuration Protocol (DHCP) to establish an IP address, and uses a Hardware Management Console (HMC) as the DHCP server, no additional configuration is necessary to enable network access to the service processor. Do the following:
    1. Ensure that the service processor is connected to the existing service network by verifying that the HMC cable is connected to the HMC port on the service processor assembly.
    2. Connect all system power cables by plugging them into power outlets.
      Note: Do not start the system at this time.
    3. Can you access the service network?
      - No: Continue with the next step.
      - Yes: Go to step Reset the processing unit power control network identifier.
  - If the network connection uses DHCP to establish an IP address, but does not use an HMC as the DHCP server, do the following:
    1. Complete any network configuration necessary to allow the DHCP server to recognize and assign an IP address to the service processor.
    2. Ensure that the service processor is connected to the existing service network by verifying that the network cable is connected to the network port on the service processor assembly.
    3. Connect all system power cables by plugging them into power outlets.
      Note: Do not start the system at this time.
    4. Can you access the service network?
      - No: Continue with the next step.
      - Yes: Go to step Reset the processing unit power control network identifier.
  - If the network connection uses static IP address assignments (not HMC managed), do the following:
    1. Connect a client with a Web browser directly to the service processor network port using one of the following URLs:
      - https://192.168.2.147
      - https://192.168.3.147
    2. Connect all system power cables by plugging them into power outlets.
      Note: Do not start the system at this time.
    3. Log on to the Advanced System Management Interface (ASMI) with the user ID admin and the default password admin.
    4. Change the admin user ID's password and the general user ID's password. Refer to Changing the password.
    5. Configure network access using the static IP address. Refer to Configuring network access.
    6. Can you access the service network?
      - No: Continue with the next step.
      - Yes: Go to step Reset the processing unit power control network identifier.
2. If you are not able to access the service network, reset the service processor network interfaces (and passwords) by doing the following:
  1. Move both service processor reset toggle switches from their current position to the opposite position.
  2. Go to step 31.a.
3. Reset the processing unit power control network identifier using the ASMI. Do the following to set the configuration ID and MTMS values:
  1. Follow the instructions in Changing processing unit power control network identifier to update the processing unit power control network ID. Change the identifier to B5.
  2. Follow the instructions in Setting the system enclosure type to change the system enclosure type.
4. The customer must do the following:
  1. Change the admin user ID's password and the general user ID's password. Refer to Changing the password.
  2. Set the system name. Refer to Viewing system name.
  3. Set the time of day. If this server uses an HMC, set the time of day using the ASMI. Refer to Viewing time of day. If this server does not use an HMC, set the time of day using the appropriate operating system command.
  4. Reenter any of the following settings that you previously changed through the ASMI, unless you want to use the defaults:
    - System power settings. Refer to Controlling the system power.
    - ASMI service aids settings. Refer to Troubleshooting the system using system service aids.
    - System configuration settings. Refer to Changing system configuration.
    - Network services settings. Refer to Configuring network services.
    - Login profile settings. Refer to Setting up login profile.
  5. Reenter any service processor settings that you may have set using operating system commands. You recorded these settings before removing the service processor.
  6. Reactivate any Capacity on Demand devices using the ASMI. Refer to Using on-demand utilities.
  7. If the system is managed by an HMC and runs logical partitions, restore the logical partition profiles. Refer to Restoring profile data using the HMC.
  8. Verify the time of day for each partition after the system is powered on and the partitions are activated. If necessary, set the time of day using the appropriate operating system command for each logical partition.
  9. If your system is managed by an HMC, reset the HMC access password. From the HMC command line, type:
```
chsyspwd -m managed system -t access --passwd --newpasswd newpassword
```
    where:
    - The value for managed system is the new service processor's managed system name.
    - No value for – –passwd is entered thereby allowing authentication.
    - The value for newpassword is the new password value.
  10. If necessary, update to the latest server firmware level. Refer to Server firmware fixes.
  11. Reboot in slow mode.
  12. Start the system.
If you replaced the system backplane as part of another procedure, return to that procedure now. If you replaced it because it was not operational, verify that the new resource is functional. See Verifying the repair.