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. 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.
Replace a CRU
Follow the replacement procedure to replace a CRU.
Service door
Prerequisite
Before you start, read
Generic Safety and Compliance Notices and print the following instructions.
Note: Do not remove the service door when your computer is connected to ac power. Otherwise, there
might be a risk of short circuits.
For access, do the following:
1. Disable the built-in battery. See “Disable Fast Startup and the built-in battery” on page 47.
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.
Removal procedure
48 ThinkPad P16 Gen 2 User Guide