Removing The Nano-Sim-Card And Nano-Sim-Card Tray; 1010 Base Cover Assembly - Lenovo ThinkPad X1 Carbon Gen 12 Hardware Maintenance Manual

5. Clear the Turn on fast startup check box, and then click Save changes.
To disable the built-in battery:
1. Restart your computer. When the logo screen is displayed, immediately press F1 to enter the UEFI BIOS
menu.
2. Select Config ➙ Power. The Power submenu is displayed.
3. Select Disable built-in battery and press Enter.
4. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off
automatically. Wait three to five minutes to let the computer cool.
Note: If your computer cannot enter the UEFI BIOS menu, it is recommended to disconnect the built-in
battery cable before replacing any internal parts.

Removing the nano-SIM-card and nano-SIM-card tray

Note: If the computer you are servicing has a nano-SIM card installed, remove the card with the tray
together.

1010 Base cover assembly

Removal steps of the base cover assembly
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ThinkPad X1 Carbon Gen 12 Hardware Maintenance Manual