Lenovo ThinkSystem SN550, Maintenance Manual

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Before you remove the adapter-retention assembly, complete the following steps:
1. Read “Safety” on page iii and “Installation Guidelines” on page 21 to ensure that you work safely.
2. Power off the corresponding compute node that you are going to perform the task on.
3. Remove the compute node from the chassis (see “Remove the compute node from the chassis” on page
24).
4. Carefully lay the compute node on a flat, static-protective surface, orienting the compute node with the
bezel pointing toward you.
5. Remove the compute node cover (see “Remove the compute node cover” on page 42).
The adapter-retention assembly consists of 12 separate parts. You can replace only the parts that you
choose and save the unused parts for future use.
To remove the adapter-retention assembly, complete the following steps:
Watch the procedure . A video of the installation process is available:
• Youtube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-B4_LYuT9X1MRWBU6UzX9gO
• Youku: http://list.youku.com/albumlist/show/id_50481482
Figure 16. Adapter-retention assembly removal
Step 1. Remove the air baffle (see “Remove the air baffle” on page 31 ).
Step 2. If necessary, remove the I/O expansion adapters (see “Remove an I/O expansion adapter” on page
57).
Step 3. Carefully place the compute node on its side, making sure the protruding part of the handle is at the
top.
Attention: If you place the compute node on its side, with the protruding part of the handle at the
bottom, the compute node will not be stable and might fall over.
Step 4. Using a T10 Torx screwdriver, remove the screws that secure each part of the adapter-retention
assembly that you are removing.
Chapter 3
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Hardware replacement procedures
33