Lenovo NeXtScale nx360 M5 Installation And Service Manual page 215

Step 1. Remove the cover (see "Removing the compute node cover" on page 113).
Step 2. Remove the air baffle (see "Removing the air baffle" on page 116).
Step 3. Locate the microprocessor to be removed (see "System-board internal connectors" on page 22).
Step 4. Remove the heat sink.
Attention: Do not touch the thermal material on the bottom of the heat sink. Touching the thermal
material will contaminate it. If the thermal material on the microprocessor or heat sink becomes
contaminated, you must wipe off the contaminated thermal material on the microprocessor or heat
sink with the alcohol wipes and reapply clean thermal grease to the heat sink.
a. Loosen the four screws on the corners of the microprocessor retainer.
b. Lift the heat sink out of the server. After removal, place the heat sink (with the thermal grease
side up) on a clean, flat surface.
Heat sink for cpu 1
Figure 137. Heat sink removal
Step 5. Open the microprocessor socket release levers and retainer.
Figure 138. Microprocessor socket levers and retainer disengagement
a. Identify which release lever is labeled as the first release lever to open and open it.
Heat sink for cpu 2
.
Chapter 5 Removing and replacing components
201