Wireless Wan Card And Wireless Wan Card Bracket (For Selected Models) - Lenovo ThinkPad 21CB006GIX User Manual

Installation 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 and wireless WAN card bracket (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
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 45.
2. Turn off the computer and disconnect the computer from ac power and all connected cables.
3. Close the computer display and turn over the computer.
4. Remove the base cover assembly. See "Base cover assembly" on page 46.
and print the following instructions.
Chapter 6
. 47
CRU replacement