Lenovo System x3550 M5 Installation And Service Manual page 284

Step 5. Open the microprocessor socket release levers and retainer:
Figure 200. Microprocessor socket levers and retainer disengagement
a. Identify which release lever is labeled as the first release lever to open and open it.
b. Open the second release lever on the microprocessor socket.
c. Open the microprocessor retainer.
Attention: Do not touch the connectors on the microprocessor and the microprocessor socket.
Step 6. Install the microprocessor in the microprocessor socket:
a. Open the packaging that contains the new microprocessor installation tool assembly and
carefully remove the installation tool assembly from the package. The microprocessor is
preinstalled on the installation tool.
Note: Do not touch the microprocessor contacts. Contaminants on the microprocessor
contacts, such as oil from your skin, can cause connection failures between the contacts
and the socket.
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Lenovo System x3550 M5 Installation and Service Guide
Microprocessor
release lever
release lever