Lenovo ThinkPad X1 Carbon User Manual page 141

The wireless-WAN card is available only on some models. To install or replace the wireless-WAN card,
do the following:
1. Turn off your computer and disconnect the ac power adapter and all cables from the computer.
2. Disable the built-in battery. See "Disabling the built-in battery" on page 119.
3. Close the computer display, and turn the computer over.
4. Remove the base cover. See "Replacing the base cover" on page 120.
5. If you are installing a wireless-WAN card, go to step 6. If you are replacing a wireless-WAN card, do the
following to remove the old card first.
a. If a tool is provided with the new card to help you disconnect cables, use the tool to disconnect the
cables from the old card. If no such a tool is provided, hold the cable connector with your fingers
and gently disconnect each cable from the old card.
b. Remove the screw that secures the wireless-WAN card.
.
Chapter 10 Replacing devices
125