Wireless Wan Card (For Selected Models) - Lenovo 21C3S0RL00 User Manual

Installation procedure
For L14 Gen 3
For L15 Gen 3
Troubleshooting
If the computer does not start up after you reinstall the base cover assembly, disconnect the ac power
adapter and then reconnect it to the computer.

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.
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ThinkPad L14 Gen 3 and ThinkPad L15 Gen 3 User Guide