Lenovo System x3500 M5 Type 5464 Installation And Service Manual page 300

Heat sink
Figure 211. Rotate the heat sink release lever to the closed position
Step 10. If you installed the second microprocessor, install the air baffle (see "Replacing the air baffle" on
page 99).
Step 11. Install and lock the left-side cover ( "Installing the left-side cover" on page 183).
If you have replaced a server component or installed an optional device in the server, you need to reconnect
the power cords and all external cables, and turn on the server and peripheral devices.
Thermal grease
The thermal grease must be replaced whenever the heat sink has been removed from the top of the
microprocessor and is going to be reused or when debris is found in the grease. Use this information to
replace damaged or contaminated thermal grease on the microprocessor and heat sink.
When you are installing the heat sink on the same microprocessor that it was removed from, make sure
that the following requirements are met:
• The thermal grease on the heat sink and microprocessor is not contaminated.
• Additional thermal grease is not added to the existing thermal grease on the heat sink and microprocessor.
Notes:
• Read the safety information in "Safety" on page v.
• Read the "Installation guidelines" on page 29.
• Read "Handling static-sensitive devices" on page 31.
To replace damaged or contaminated thermal grease on the microprocessor and heat sink, complete the
following steps.
Step 1. Place the heat sink on a clean work surface.
Step 2. Remove the cleaning pad from its package and unfold it completely.
Step 3. Use the cleaning pad to wipe the thermal grease from the bottom of the heat sink.
Note: Make sure that all of the thermal grease is removed.
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System x3500 M5 Installation and Service Guide
Heat sink
release lever