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## Install the Motherboard Assembly

Note - This is a cold service procedure that must be performed by qualified service personnel. See Cold Service, Replaceable by Authorized Service Personnel for more information about this category of service procedures.

| Caution - The server must be fully shut down and the power cords disconnected.

| Caution - This procedure involves handling circuit boards that are extremely sensitive to static electricity. Ensure that you follow ESD preventative practices to avoid damaging the circuit boards.

| Caution - Components inside the chassis might be hot. Use caution when servicing components inside the chassis.

1. Tilt the motherboard assembly to position it into the chassis.

   Tip - Note the metal tab projecting into the motherboard compartment from the rear, right corner of the chassis. In the next step, use care to avoid having this tab interfere with the installation of the motherboard.

2. Hold the green handle and the back edge of the motherboard and lower it down into the chassis.
3. Slide the motherboard forward until it is aligned with the bus bar screw holes and the captive screw.
4. Tighten the captive screw that secures the motherboard.
5. Using a No. 2 Phillips screwdriver, install the four bus bar screws and tighten them until the motherboard is securely fastened to the bus bar.

   Note - Be certain to use the correct screws to attach the motherboard to the bus bar. Ordinarily, these would be the bus bar screws that were removed as part of the motherboard removal procedure.

6. If you are installing a new motherboard, install the following components:
   - All DIMMs removed from the previous motherboard. Ensure that the DIMM modules are installed in the same memory configuration as they were in previously.

     See Memory Configuration Guidelines.

   - System configuration PROM.
   - Service processor.
   - Internal USB drive (if used).
7. Connect the three backplane cables that were disconnected earlier.
8. Connect the two ribbon cables that were disconnected earlier.
9. Reinstall the PCIe and PCIe/XUAI risers.

   See Install a PCIe or PCIe/XAUI Riser.

   Note - If any internal HBA card is present, reconnect all internal cables that were disconnected earlier.

10. Install the top cover.

    See Install the Top Cover.

11. Install the server into the rack.

    See Reinstall the Server in the Rack.

12. Attach the power cables.

    See Reconnect the Power Cords.

13. Connect a terminal or a terminal emulator (PC or workstation) to the SP SER MGT port.

    If the SP detects that the new host firmware component is incompatible with SP firmware component, further action will be suspended and the following message will be delivered over the SER MGT port.

        Unrecognized Chassis: This module is installed in an unknown or
        unsupported chassis. You must upgrade the firmware to a newer
        version that supports this chassis.

    If you see this message, go on to Step 14.

14. Download the system firmware.
    1. If needed, configure the service processor's network port to enable the firmware image to be downloaded.

       Refer to the Oracle ILOM documentation for network configuration instructions.

    2. Download the system firmware.

       Follow the firmware download instructions in the Oracle ILOM documentation.

       Note - You can load any supported system firmware version, including the firmware revision that had been installed prior to the replacement of the motherboard.

15. Power on the server.

    See Power On the Server (`start /SYS` Command) or Power On the Server (Power Button).

##### Related Information

- Remove the Motherboard Assembly

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