Lenovo ThinkSystem SR650 Maintenance Manual page 175

Before removing the M.2 backplane and M.2 drive:
1. Remove the top cover. See "Remove the top cover" on page 103.
2. For easier operation, remove the riser 2 assembly. See "Remove a riser card" on page 145.
To remove the M.2 backplane and M.2 drive, complete the following steps:
Step 1. Grasp the M.2 backplane at both ends and pull it straight up to remove it from the system board.
Figure 130. M.2 backplane removal
Step 2. Remove the M.2 drive from the M.2 backplane by doing the following:
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Chapter 3 Hardware replacement procedures
167