Before you replace any CRU
Before replacing any CRU, ensure that you disable Fast Startup first and then disable the built-in battery.
Disable Fast Startup
Follow the instructions to disable Fast Startup.
Step 1
Go to Control Panel and view by Large icons or Small icons.
Step 2
Click Power Options, and then click Choose what
the power buttons do on the left pane.
Step 3
Click Change settings that are currently unavailable at the top.
Step 4
If prompted by User Account Control (UAC), click Yes.
Step 5
Clear the Turn on fast startup check box, and then click Save changes.
Disable the built-in battery
Follow the instructions to disable the built-in battery.
Step 1
Restart your computer. When the logo screen is displayed,
immediately press F1 to enter the UEFI BIOS menu.
Step 2
Select Config ➙ Power. The Power submenu is displayed.
Step 3
Select Disable Built-in Battery and press Enter.
Step 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, you cannot disable the built-in battery. To ensure safety when you replace a CRU, it is recommended to do the following:
- For the built-in battery connected to the system board with cables: Disconnect the battery cables.
- For the CRUable built-in battery connected to the system board with comb connectors: Remove the battery. For the removal procedure, refer to the built-in battery replacement instructions in this documentation.
- For the non-CRUable built-in battery connected to the system board with comb connectors: Call Lenovo Customer Support Center for help.
To check whether the built-in battery on your computer is a CRU, see the CRU list in CRU replacement.