Wireless-Wan Card (For Selected Models) - Lenovo ThinkPad X1 User Manual

5. Install the new base cover assembly in place
are secured under the base cover assembly. Then, tighten the screws in ascending alphabetical order (a
to e) to secure the base cover assembly
6. Turn over the computer. Connect the ac power adapter and all disconnected cables to the computer.
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 Appendix A "Important safety information" on page 67 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.
Replacement procedure
1. Disable the built-in battery. See "Disable Fast Startup and the built-in battery" on page 53.
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 54.
1 2 . Ensure that the latches of the base cover assembly
3 .
.
Chapter 7 CRU replacement
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