Wireless Wan Card (For Selected Models) - Lenovo 21FC0038CA User Manual

Removal procedure
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.
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
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.
3. Close the computer display and turn the computer over.
4. Remove the nano-SIM-card tray if your computer comes with one. See "Connect to a cellular network
(for selected models)" on page 10.
5. Remove the base cover assembly. See "Base cover assembly" on page 42.
Removal procedure
Note: A Mylar film might cover the wireless WAN card. To access the wireless WAN card, peel off the film
first.
and print the following instructions.
Chapter 6
. 43
CRU replacement