How to Install the Motherboard

1. If necessary, perform the steps to remove the old motherboard. See How to Remove the Motherboard.
2. Ensure that the mylar insulation is in the chassis and that it 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.

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   Caution - Potential for component damage. Do not install the motherboard without the mylar insulation in place.

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3. Carefully lower the new motherboard into the chassis with the rear of the motherboard tilted downward.
4. Insert the motherboard power tab into the opening in the chassis midwall.
5. Insert the light pipes and connectors on the motherboard into the corresponding holes in the chassis back panel.
6. Lower the front of the motherboard, using care to align the corresponding holes in the motherboard over the six bus-bar bolts.
   
7. Lower the small metal door in the chassis midwall that closes over the motherboard power tab.

   When you slide the door down, first push outward on the door’s handle to free it from the tab in the chassis midwall. This door must be closed to ensure proper air circulation and cooling.

   
   
8. Secure the motherboard to the power bus bars using the six screws.

   Torque screws to 7 inch-pounds (0.8 newton meters).

9. Tighten the five captive screws that secure the motherboard to the chassis.

   Torque screws to 7 inch-pounds (0.8 newton meters).

10. Connect the flex cable to the motherboard connector.
11. Connect the front indicator board flex cable to the motherboard flex cable connector.
    
12. To install the rear CPU module guide, align the edges of the guide with the metal edge-guides in the chassis, then lower the guide until it is seated firmly against the motherboard.

    When you install the guide, be sure to align it so that the interlock switch lever is over the interlock switch on the motherboard.

13. To secure the guide to the motherboard and chassis, tighten the six captive screws.
    
14. Install the fan tray carriage. See How to Install the Fan Tray Carriage.
15. Install any PCI cards. See How to Install a PCI Card.
16. Install the CPU modules and filler cards. See How to Install a CPU Module or Filler Card.
17. Prepare the server for operation. See How to Prepare the Server for Operation.
18. Update the motherboard FRU information. See Updating Field-Replaceable Unit Information.
19. Update the system with the BIOS/ILOM firmware package you downloaded earlier. See the “Before You Begin” section in How to Remove the Motherboard.

    This will ensure that both the BIOS and ILOM firmware (which are packaged and tested together) are at a supported level.

    For information about updating firmware, see Updating Firmware in Sun ILOM 3.0 Supplement for the Sun Fire X4640 Server.