Lenovo ThinkPad L390 User Manual page 64

6. Install the new coin-cell battery 1 , and then attach the connector 2 .
7. Reinstall the base cover assembly.
8. Turn the computer over. Connect the ac power adapter and all cables to the computer.
9. Reset the system date and time in the BIOS menu. See "Set the system date and time" on page 38.
58
L390, L390 Yoga, S2 4th Gen, and S2 Yoga 4th Gen User Guide