Lenovo ThinkStation P340 Hardware Maintenance Manual page 73

2. Remove the 2.5-inch primary storage drive cage, if any. See "Primary storage drives" on page 57.
Replace the M.2 solid-state drive and the heat sink depending on the computer model:
• For computers without the heat sink for the M.2 solid-state drive, do the following:
• For computers with the heat sink for the M.2 solid-state drive:
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Chapter 7 Hardware removal and installation