Lenovo ThinkSystem ST550 7X09 Maintenance Manual page 175

Figure 123. Assembling a PHM outside of a shipping tray
a. Align the triangular marks on the processor retainer and the heat sink or align the triangular mark on
the processor retainer with the notched corner of the heat sink.
b. Insert the processor-retainer clips into the holes on the heat sink.
c. Press the retainer into place until the clips at all four corners engage.
To install a PHM, complete the following steps:
Watch the procedure. A video of the installation process is available:
• Youtube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-Acsjj4tU79GzKnWG316BYn
• Youku:
http://list.youku.com/albumlist/show/id_50483452
Step 1. Remove the processor socket cover, if one is installed on the processor socket, by placing your
fingers in the half-circles at each end of the cover and lifting it from the system board.
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Chapter 3 Hardware replacement procedures
167