Base Cover Assembly - Lenovo ThinkPad L390 User Manual

13. Take the new TrackPoint buttons out of the new keyboard package. Install the TrackPoint buttons as
shown.
14. Turn the computer over. Connect the ac power adapter and all disconnected cables to the computer.

Base cover assembly

Prerequisite
Before you start, read Appendix A "Important safety information" on page 65 and print the following
instructions.
Note: Do not remove the base cover assembly if your computer is connected to ac power. Otherwise, there
might be a risk of short circuits.
Replacement procedure
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.
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L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen User Guide