Lenovo ThinkSystem ST550 7X09, Maintenance Manual

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• If you are replacing the processor or heat sink, separate the processor and its retainer from the heat sink.
Figure 119. Separating a heat sink from a processor
1. Press the retaining clip at the corner of the processor retainer closest to the pry point; then, gently pry
this corner of the retainer away from the heat sink with a flat-bladed screwdriver, using a twisting
motion to break the processor-to-heat-sink seal.
2. Release the remaining retaining clips and lift the processor and retainer from the heat sink.
3. After separating the processor and retainer from the heat sink, hold the processor and retainer with
the thermal-grease side down and the processor-contact side up to prevent the processor from
falling out of the retainer.
Note: The processor retainer will be removed and discarded in a later step and replaced with a new
one.
• If you are replacing the processor, you will be reusing the heat sink. Wipe the thermal grease from the
bottom of the heat sink using an alcohol cleaning pad.
• If you are replacing the heat sink, you will be reusing the processor. Wipe the thermal grease from the top
of the processor using an alcohol cleaning pad.
If you are instructed to return the old processor or heat sink, follow all packaging instructions and use any
packaging materials that are provided.
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ThinkSystem ST550 Maintenance Manual