Lenovo ThinkPad L390 User Manual page 60

6. Install a new M.2 solid-state drive.
a. Slide the new M.2 solid-state drive into the Mylar film.
b. Insert the new M.2 solid-state drive to the drive slot. Then, pivot the drive downward and install the
screw to secure the drive.
7. Reinstall the base cover assembly.
8. Turn the computer over. Connect the ac power adapter and all disconnected cables to the computer.
Replacement procedure for the short M.2 solid-state drive
1. Disable the built-in battery. See "Disable Fast Startup and the built-in battery" on page 43.
2. Turn off the computer and disconnect the computer from ac power and all connected cables.
3. Close the computer display and turn the computer over.
4. Remove the base cover assembly. See "Base cover assembly" on page 48.
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L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen User Guide