Replace A Cru; Base Cover Assembly - Lenovo ThinkPad R15 Gen 2 User Manual

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.

Base cover assembly

Prerequisite
Before you start, read Appendix A "Important safety information" on page 57 and print the following
instructions.
Notes: Do not remove the base cover assembly in the following situations. Otherwise, there might be a risk
of short circuits.
• When your computer has the removable battery installed
• When your computer is connected to ac power
Replacement procedure (E14/R14/S3 Gen 2)
1. Disable the built-in battery. See "Disable Fast Startup and the built-in battery" on page 37.
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.
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E14/R14/E15/R15/S3 Gen 2 User Guide