Replace A Cru; Base Cover Assembly - Lenovo ThinkPad L15 Gen 3 User Manual

1. Restart your computer. When the logo screen is displayed, immediately press F1 to enter the UEFI BIOS
menu.
2. Select Config ➙ Power. The Power submenu is displayed.
3. Select Disable Built-in Battery and press Enter.
4. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off
automatically. Wait three to five minutes to let the computer cool.

Replace a CRU

Follow the replacement procedure to replace a CRU.

Base cover assembly

Prerequisite
Before you start, read Generic Safety and Compliance Notices
Note: Do not remove the base cover assembly when your computer is connected to ac power. Otherwise,
there might be a risk of short circuits.
For access, do the following:
1. Disable the built-in battery. See "Disable the built-in battery" on page 29.
2. Turn off the computer and disconnect the computer from ac power and all connected cables.
3. Remove the nano-SIM-card tray if your computer comes with one.
4. Close the computer display and turn over the computer.
Removal procedure
For L14 Gen 3
30
L14 Gen 3 and L15 Gen 3 User Guide
and print the following instructions.