ThinkPad T470 User Manual page 127

• There might be a risk of short circuits if you remove the base cover assembly in the following situations:
– When your computer has the removable battery installed
– When your computer is connected to ac power
Besides, the computer will not start after you reinstall the base cover assembly. To start the computer,
disconnect the ac power adapter and then reconnect it to the computer.
To replace the base cover assembly, do the following:
1. Disable the built-in battery. See "Disabling the built-in battery" on page 107.
2. Ensure that the computer is turned off and disconnected from ac power and all cables.
3. Close the computer display and turn the computer over.
4. Remove the removable battery. See "Replacing the removable battery" on page 108.
5. Loosen the screws that secure the base cover assembly as shown.
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Chapter 9 Replacing devices
111