Remove a CPU

Removing a CPU is a cold-service operation. You must power off the server before you remove the CPU.

1. Determine which CPU to remove.

   See Locate a Faulty CPU.

2. Consider your next step.

   • If you have not prepared for service, do so now. See Preparing for Service.

   • If you are removing a CPU as part of another component's removal or installation procedure, go to Step 3.

3. Review this information and complete these prerequisites in this order.

   • Remove the Filter

   • Remove a Fan Module

     Remove all fan modules.

   • Remove the Fan Tray

   • Raise the Drive Cage to the Service Position

   • Remove the Air Duct

4. Locate the CPU to remove.

   See CPU Configuration.

5. Loosen the four captive screws of the CPU heat sink.

   Alternate between the screws in an X pattern, turning each 1 revolution, until they are fully removed.

   
   
6. Grasp the heat sink and wiggle it clockwise and counterclockwise while pulling up.

   This action breaks the adhesion of the heat sink to the CPU.

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   Caution - Do not pull forcibly as you might damage the heat sink or CPU socket.

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7. Use an alcohol pad to clean the thermal compound from the heat sink and CPU.

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   Note - Be careful not to get the thermal compound on your fingers because this could contaminate components.

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8. Unhook the pressure frame release levers from the catches of the CPU socket and raise them upward to approximately 35 degrees.
   
9. Release the pressure frame by slightly lowering the right release lever and lifting the pressure frame up to the fully open position.
   
10. Press the release button on the CPU tool.
    
11. Position the tool over the CPU socket and lower it onto the CPU.

    The triangle on the side of the tool aligns with pin 1 of the CPU.

    
    
12. Push the hold lever outward to engage the CPU.

    You hear a click, and the release button retracts.

    
    
13. Grasp the tool by its sides and lift it from the CPU socket.
    
14. While holding the tool upside down with one hand, and the CPU edges with the other hand, press the release button.
    
15. Lift the CPU out of the tool and place it pin side down on an antistatic mat.
    
16. Repeat from Step 4 for any additional CPU to be removed.
17. Install the replacement CPU.

    See Install a CPU.

Related Information

• Locate a Faulty CPU

• Install a CPU

• Preparing for Service

• Returning the Server to Operation