User Manual

Coin-cell battery
Prerequisite
Before you start, read
Generic Safety and Compliance Notices and print the following instructions.
For access, do the following:
1. Disable the built-in battery. See “Disable Fast Startup and the built-in battery” on page 41.
2. Turn off the computer and disconnect the computer from ac power and all connected cables. Then,
close the computer display
3. Remove the nano-SIM-card tray if your computer comes with one. See “Connect to a cellular network
(for selected models)” on page 9.
4. Remove the base cover assembly. See “Base cover assembly (T14 Gen 2 and P14s Gen 2)” on page 42
or “Base cover assembly (T15 Gen 2 and P15s Gen 2)” on page 44.
Removal procedure
Note: After installation, reset the system date and time in the UEFI BIOS menu. See “Set the system date
and time” on page 37.
Wireless WAN card (for selected models)
The following information is only for the computer with user-installable modules. Ensure that you use only a
Lenovo-authorized wireless module specifically tested for this computer model. Otherwise, the computer will
generate an error-code beep sequence when you turn on the computer.
Prerequisite
Before you start, read
Generic Safety and Compliance Notices and print the following instructions.
Attention: Do not touch the contact edge of the wireless WAN card. Otherwise the wireless WAN card might
get damaged.
For access, do the following:
1. Disable the built-in battery. See “Disable Fast Startup and the built-in battery” on page 41.
2. Turn off the computer and disconnect the computer from ac power and all connected cables. Then,
close the computer display.
Chapter 6. CRU replacement 49