SPARC T5-2 Server Service Manual

Remove the Motherboard

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Caution  - Ensure that all power is removed from the server before removing or installing the motherboard assembly. You must disconnect the power cables from the server before performing these procedures.

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Caution  - These procedures require that you handle components that are sensitive to ESD. This sensitivity can cause the component to fail. To avoid damage, ensure that you follow antistatic practices as described in ESD Measures.

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This is a cold-service procedure that must be performed by qualified service personnel. The server must be completely powered down before performing this procedure. See Component Service Categories for more information about this category of service procedures.

1. Prepare for servicing.
   1. Attach an antistatic wrist strap.
   2. Power off the server and unplug power cords from the power supplies.

      See Removing Power From the Server.

   3. Remove the server from the rack.

      See Remove the Server From the Rack.

   4. Remove the top cover.

      See Remove the Top Cover.

2. Remove all PCIe cards.

   See Remove a PCIe Card or Filler Panel.

   Always remove transceivers from a PCIe card before removing the card from the server.

3. Remove the System Configuration PROM from the motherboard.

   You will reinstall it on the new motherboard.

   
   
4. Remove the SP.

   You will reinstall the SP on the new motherboard. See Remove the SP.

5. Remove all memory risers.

   See Remove a Memory Riser and DIMM.

6. On a 1-processor motherboard, remove the airflow baffle from the empty side of the center bracket.

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   Note - Save the airflow baffle to install on the new 1-processor motherboard.

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   1. On the processor side of the center bracket, lift the airflow baffle's hooks away from the edge of the center bracket (panel 1).
   2. Lift the airflow baffle away from the motherboard (panel 2).
7. Remove the System Remind button assembly (air divider) by lifting it up and away from the power supplies.
8. Disconnect all cables connected to the motherboard.
   1. Disconnect two longer cables that connect the motherboard to the drive backplane.

      Push down a metal tab on each connector and pull up.

   2. Disconnect two shorter cables from the motherboard.

      One cable goes to the drive backplane. The other is a ribbon cable to the power supply.

   3. Disconnect the fan board power cable and the ribbon cable from the motherboard.
9. Remove the power supply cover (panel 1).

   You must guide two slots on the PS backplane cover around two pins on the inside of the power supply cage.

   1. Lift the cover up a little to clear the first part of the slots.
   2. Pull the cover a little towards the front of the chassis.
   3. Push the tooth at the bottom of the cover to clear the edge of the power supply cage.
   4. Lift the cover out of the chassis.

      Notice the two cables that are now exposed. Be prepared to move those cables out of the way when you lift the motherboard.

10. Remove the four bus bar screws that secure the motherboard to the PS backplane.

    See Remove the PS Backplane.

11. Position the drive end of the cables off to the side using the tab on the top of the plastic power supply cover.
12. Remove the motherboard.
    
    1. Loosen the captive screw (in the corner near the fans) that secures the motherboard to the chassis (panel 1).
    2. Grasp the handle on the motherboard and slide it toward the front of the chassis.

       Tilt up the end of the motherboard that is near the front of the chassis.

    3. Lift the motherboard out of the chassis.

       Ensure that remaining cables do not get caught on edges of the motherboard.

13. Remove the service processor from the motherboard so you can reinstall it on the new motherboard.

    See Remove the SP.

14. Install a new motherboard.

    See Install the Motherboard.

Related Information

• Install the Motherboard

• Verify Motherboard Functionality