Disable Fast Startup And The Built-In Battery; Removing The Nano-Sim-Card And Nano-Sim-Card Tray - Lenovo 21CH004MGE 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.

Disable Fast Startup and the built-in battery

Before replacing any CRU, ensure that you disable Fast Startup first and then disable the built-in battery.
To disable Fast Startup:
1. Go to Control Panel and view by Large icons or Small icons.
2. Click Power Options, and then click Choose what the power buttons do on the left pane.
3. Click Change settings that are currently unavailable at the top.
4. If prompted by User Account Control (UAC), click Yes.
5. Clear the Turn on fast startup check box, and then click Save changes.
To disable the built-in battery:
1. Enter the setup utility.
2. Select Configuration ➙ Disable Built-in Battery and press Enter.
3. 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.

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.
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T16 Gen 1 / P16s Gen 1 Hardware Maintenance Manual