Install the Motherboard Assembly

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Caution - This procedure requires that you handle components that are sensitive to static discharge. This sensitivity can cause the component to fail. To avoid this problem, ensure that you follow antistatic practices as described in Perform Static Discharge Procedures.

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1. Reinstall the eight energy storage module power cables on the motherboard to their original positions.

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   Note - The ESM cables fit firmly on their receptacles. Use care when reinstalling these cables to avoid damaging the motherboard.

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2. Position the motherboard so that its screw holes align with the chassis standoffs as shown in panel 1 of Installing a Motherboard.
3. Using the green handle and the back edge of the motherboard tray, push down firmly and equally while sliding the motherboard to the front of the chassis as shown in panel 2 of Installing a Motherboard.

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   Tip - After installing the motherboard on the chassis, ensure that the motherboard is correctly seated by gently lifting up on the green handle. If the board moves upward, then it is not correctly seated. Ensure that the motherboard tray sits flush with the chassis floor. Also, check for binds and ensure that the bus bar screw holes are correctly aligned with the bus bar at the front of the motherboard.

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4. Tighten the green captive screw that secures the motherboard to the front of its tray in the chassis as shown in panel 3 of Installing a Motherboard.
5. Using a No. 2 Phillips screwdriver, install the four screws and the green captive screw that were removed during the removal procedure as shown in panel 3 of Installing a Motherboard.

   When you reinstall the motherboard, you must use the correct screws to attach the motherboard to the bus bar.

   
   

   Figure 35 Installing a Motherboard

   
6. Reinstall the two cables that connect the motherboard to the backplane as shown in Installing Cables on Backplane.
   

   Figure 36 Installing Cables on Backplane

   
7. If you are installing a new motherboard, reinstall the Flash Modules on the motherboard in the same configuration in which they were previously installed.
8. Reinstall the motherboard-to-PDB cable as shown in Installing the Motherboard-to-PDB Cable.
   

   Figure 37 Installing the Motherboard-to-PDB Cable

   
9. Replace the top chassis cover.

   Refer to Replace the Top Chassis Cover.

10. Return the system to the installed position.

    Refer to Return the System to the Fully Installed Position.

11. Reconnect any cables that were disconnected before the motherboard was removed.
12. Restore power to the system.

    Refer to Power On the System.