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## How to Remove the Motherboard

Before You Begin

- If you are replacing a motherboard that is not dead, obtain the BIOS and ILOM versions and download the system software release package (combined BIOS/ILOM) that incorporates those versions. A system software release package can be downloaded from: http://support.oracle.com.

- If you are replacing a dead motherboard, obtain the ILOM version and download the system software release package (combined BIOS/ILOM) that incorporates that version. A system software release package can be downloaded from: http://support.oracle.com.

- Copy down the motherboard serial number information.

1. Prepare the server for service. See How to Prepare the Server for Service.
2. Remove the fan tray carriage from the chassis. See How to Remove the Fan Tray Carriage.
3. To remove the rear CPU module guide from the chassis, loosen the six captive screws that secure the guide to the motherboard and chassis.
4. Lift up evenly on both sides of the guide to remove it from the edge-guides in the chassis.
5. Disconnect the main flex cable from the motherboard connector. See Motherboard Connectors and Fasteners.
6. Disconnect the front panel flex cable from the motherboard connector.
7. Remove the six bus bar screws that secure the motherboard to the power bus bars. See Motherboard Connectors and Fasteners.
8. Loosen the five captive screws that secure the motherboard to the chassis. See Motherboard Connectors and Fasteners.
9. Slide up the small metal door in the chassis midwall (near the flex-cable connector) to provide clearance for the power tab of the motherboard.

   The metal door stays open when you slide it up into the retaining clips.

10. Use the motherboard lifting handle to raise the forward edge of the board until it has cleared the bus bar studs.

    | Caution - When lifting the board, avoid damaging the light pipes and connectors on the rear edge of the motherboard.

11. Slide the board toward the front of the chassis until the connectors and light pipes are clear of the chassis back panel.
12. Lift the motherboard and remove it from the chassis.

    Underneath the motherboard is a sheet of mylar insulation. This insulation must stay with the chassis. Do not remove it with the motherboard.

13. Ensure that the mylar insulation remains in the chassis and is correctly installed.

    The mylar insulation should lie flat. It is stamped to fit within the chassis and uses the standoff and support pegs for alignment.

Next Steps

- How to Install the Motherboard

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