Exchanging the system backplane in the model 9115-505

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

1. 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.
2. 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 unit.
      Note: This system might be equipped with a second power supply. Before continuing with this procedure, ensure that the power source to the system is 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 on the system unit 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.
   5. Make a note of cable connections and disconnect all of the cables from the system unit.
   6. Move the system unit into the service position. For instructions, see Place the rack-mounted system in the service position.
      Note: This unit weighs approximately 17 kg (37 pounds) be sure you can safely support this weight when removing the system unit from the rack.
   7. Remove the system unit from the rack, by pressing the release latches on each extended rail, and pulling the unit outward. Place the system unit on a flat work surface.
   8. Remove the service access cover.
   9. Open the fan access door on the top of the system unit by releasing the two latches.
3. Prepare to remove the system backplane by doing the following:
   Note: For reference when doing the steps in this procedure, refer to Part assembly diagrams for model 505.
   1. Remove the PCI adapter riser cards from the backplane connectors by pulling the riser card assemblies upwards, out of the system unit, and place the riser card assemblies on a flat, antistatic surface.
   2. Remove the long PCI adapter plastic support bracket. Each leg of the bracket fastens through the backplane in opposite directions.
   3. Remove the removable media drive.
   4. Remove the control panel cable from the L-shaped media card which is located behind the operator panel enclosure and in front of the fan assembly.
   5. Remove the L-shaped media card, held in place with snap fasteners.
   6. Remove the S-shaped bracket that holds one end of the L-shaped media card in place. A single screw retains this bracket near the power supply enclosure.
   7. Remove the disk drives. See Disk drive.
   8. Remove the power supplies. See Power supply.
   9. Remove the voltage regulator modules. See Voltage regulator module.
   10. Remove the memory modules. See Memory modules.
   11. Remove the VPD card. See Exchanging the VPD card.
   12. If so equipped, remove the RAID card assembly by releasing the plastic retaining tabs and pulling the card upward.
   13. Disconnect the fan assembly cables from the system backplane.
   14. Remove the screws that attach the system backplane to the system unit.
       • 12 screws fasten backplane to chassis.
       • 4 screws fasten backplane connectors to chassis at rear of enclosure. Use care when removing these screws to avoid damaging the threads.
       Save these screws because they are needed to install the new backplane.
4. Lift and remove the system backplane.
5. Replace the system backplane and reassemble the enclosure by reversing the previous steps in this procedure.
   Note: Review the following before continuing with the next step.
   • Do not attach power cords, power on, or IPL the system until directed to do so. Failure to do so could result in bus renumbering.
   • Do not start the system at this time. You are instructed when to connect the power and start the system later in this procedure.
   • If the system is managed by an HMC, check the system's connection to the HMC through the service network. Before continuing, the HMC and the service network should be operating normally.
   Continue with the next step.
6. After you replace a system backplane assembly, do the following to restore the service processor and SPCN settings:
   1. Enable the service 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 system's service processor is connected to the existing service network by verifying that an HMC service network cable is connected to an HMC port on the system.
        2. Connect all system power cables by plugging them into power outlets.
        3. Can you access the service network?
           • No: To reset the service processor reset toggle switches, go to step 6.b.
           • Yes: To reset the processing unit identifier using the ASMI, go to step 6.c.
      • 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 system's service processor is connected to the existing service network by verifying that an HMC service network cable is connected to an HMC port on the system.
        3. Connect all system power cables by plugging them into power outlets.
        4. Can you access the service network?
           • No: To reset the service processor reset toggle switches, go to step 6.b.
           • Yes: To reset the processing unit identifier using the ASMI, go to step 6.c.
      • If the network connection uses static IP address assignments (not managed by an HMC), 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.
        3. On the client's Web browser, Log in 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 ASMI password.
        5. Configure network access using the static IP address. Refer to Configuring network access.
        6. Can you access the service network?
           • No: To reset the service processor reset toggle switches, go to step 6.b.
           • Yes: To reset the processing unit identifier using the ASMI, go to step 6.c.
   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. To identify the service processor reset toggle switches, see Locations — model 505 .
      2. To enable network access to the service processor, return to step 6.a.
   3. Reset the processing unit identifier and the MTMS values using the ASMI by doing the following:
      1. Follow the instructions in Changing processing unit identifier to update the processing unit identifier. Change the identifier to C0.
      2. Follow the instructions in Setting the system enclosure type to change the system enclosure type.
   4. Ask the customer (system administrator) to do the following:
      1. Change the admin user ID's password and the general user ID's password. Refer to Changing ASMI password.
      2. Set the system name. Refer to Changing system name.
      3. Set the time of day. If this server uses an HMC, set the time of day using the ASMI. Refer to Changing the 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 system backplane (the service processor is integrated on the system backplane).
      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
7. If you replaced the system backplane as part of another procedure, return to that procedure now. If you replaced the system backplane because it was not operational, verify that the new resource is functional. See Verifying the repair.