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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 Chapter 6 “CRU
replacement” on page 33.
Replace a CRU
Follow the instructions to replace a CRU.
Base cover assembly
Follow the instructions to replace the base cover assembly.
Before you start, read Generic Safety and Compliance Notices.
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
For access, do the following:
1. Disable Fast Startup and the built-in battery. See “Before you replace any CRU” on page 33.
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.
Tools needed:
• Phillips head screwdriver
• Pry tool
Step 1.
Loosen the seven captive screws and remove the base cover assembly as shown below.
Note: Prepare a pry tool to release the hooks.
• ThinkPad E14 Gen 7
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Linux User Guide