Lenovo Flex System x220 Installation And Service Manual page 684

3. Carefully lay the compute node on a flat, static-protective surface, orienting the compute node with
the bezel pointing toward you.
The following notes describe information that you must consider when you remove a microprocessor:
• Each microprocessor socket must always contain a socket cover and heat-sink filler or a microprocessor
and heat sink. If the compute node has only one microprocessor, it must be installed in microprocessor
socket 1.
• The microprocessor installation tool might become worn after several uses. Make sure that the tool can
hold the microprocessor securely if you are reusing an existing microprocessor installation tool. Do not
return the tool with other parts that you are returning.
• If you are installing a second microprocessor, the option kit comes with a microprocessor installation tool
that you must use when you install a microprocessor. The microprocessor installation tool comes with the
replacement microprocessor installed on it and a cover over the microprocessor.
• If you are replacing a defective microprocessor, the CRU kit comes with one installation tool with
the replacement microprocessor installed on it and a cover over the microprocessor, and one empty
installation tool without a cover.
• If you are replacing a defective microprocessor, you must obtain alcohol wipes and thermal grease for use
during the replacement procedure (see Chapter 5 "Parts listing, Types 2585 and 7906" on page 55).
To remove a microprocessor and heat sink, complete the following steps.
Heat sink 2
Socket cover
Heat sink
filler
Step 1. Remove the cover (see "Removing the compute node cover" on page 643).
Step 2. Locate the microprocessor that is to be removed (see "System-board connectors" on page 17).
Step 3. 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 replace the heat sink.
a. Use a screwdriver to loosen the screw on one side of the heat sink to break the seal with
the microprocessor.
b. Use a screwdriver to loosen the screws on the heat sink, rotating each screw two full turns
until each screw is loose.
c. Gently pull the heat sink from the microprocessor.
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Flex System x220 Compute Node Installation and Service Guide
Heat sink key