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Removing the microprocessor and heat sink (Trained technician only)

The following notes describe the type of microprocessor that the server supports and other information that you must consider when you install or remove a microprocessor and heat sink:

  • The server supports one Intel land grid array (LGA) 1151 dual-core or quad-core microprocessor. The type, speed, and L3 cache of the microprocessor depends on the server model.
  • Read the documentation that comes with the microprocessor to determine whether you have to update the server firmware. To download the most current level of server firmware, go to the Lenovo Support Portal and https://datacentersupport.lenovo.com.
  • The microprocessor uses an integrated voltage regulator on the system board.
Attention
  • Do not allow the thermal grease on the microprocessor and heat sink to come in contact with anything. Contact with any surface can compromise the thermal grease and the microprocessor socket.
  • Dropping the microprocessor during installation or removal can damage the contacts.
  • Do not touch the microprocessor contacts; handle the microprocessor by the edges only. Contaminants on the microprocessor contacts, such as oil from your skin, can cause connection failures between the contacts and the socket.
  • The pins on the sockets are fragile. Any damage to the pins might require replacing the system board.

  • Removing the heat sink from the microprocessor destroys the even distribution of the thermal grease, you must wipe off the thermal grease with the alcohol wipes and reapply clean thermal grease. See Thermal grease.

  • After you remove a new microprocessor or a new heat sink, you need to install a new one. See Installing the microprocessor and heat sink (Trained technician only).

To remove the microprocessor and heat sink, do the following:

  1. Turn off the server. Then, disconnect all external cables and remove all peripheral devices.
  2. Remove the server cover. See Removing the server cover.
  3. Remove the air baffle. See Removing the air baffle.
  4. Remove the heat sink.
    CAUTION

    Graphic illustrating Safety Statement 12

    Graphic illustrating Safety Statement 12
    The heat sink might become very hot during normal operation. Allow time for the heat sink to cool down before you touch it.
    1. Use a screwdriver to loosen the captive screws 1 by rotating screws until each screw is loose.
    2. Alternate among the screws until they break the seal with the microprocessor.
    3. Gently twist the heat sink to free it from the microprocessor and then lift the heat sink off the system board.
      Figure 1. Heat sink removal
      Heat sink removal

  5. Place the heat sink on its side on a clean, flat surface after removal.
  6. Remove the microprocessor.
    1. Open the microprocessor retention latch by gently pressing down the handle a little bit and then pushing the handle outward.
    2. Open the microprocessor bracket. Keep the bracket in the open position.
    3. Hold the microprocessor by its edges and carefully lift the microprocessor straight up and out of the socket.
    Attention
    Handle the microprocessor carefully. Dropping the microprocessor during removal can damage the contacts. In addition, contaminants on the microprocessor contacts, such as oil from your skin, can cause connection failures between the contacts and the socket.
    Figure 2. Microprocessor removal
    Microprocessor removal

  7. Place the microprocessor on a static-protective surface.
    Attention
    The pins on the sockets are fragile. Any damage to the pins might require replacing the system board.