Lenovo 5457 Installation And Service Manual page 302

b. Press firmly on the captive screws and loosen them with a screwdriver.
c. Use your fingers to gently pull the heat sink from the microprocessor.
Important: Be careful when you handle the microprocessor and heat sink. If the microprocessor and
heat sink will be reused, do not contaminate the thermal material between them.
System board
Figure 220. Heat sink removal for 4U server model with non-hot-swap power supplies
Attention: The microprocessor retention latch is spring-loaded when the microprocessor is in place.
Releasing the latch too quickly or allowing it to spring upward can damage the microprocessor and
surrounding components.
7. Release the microprocessor retention latch by pressing down on the end, moving it to the side, and
slowly releasing it to the open (up) position.
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Heat sink