User Manual

• 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.
2. Ensure that the computer is turned off and disconnected from ac power and all cables.
3. Remove the connector cover as shown.
4. Close the computer display and turn the computer over.
5. Remove the removable battery. See “Replacing the removable battery” on page 98.
6. Loosen the screws that secure the base cover assembly as shown.
102 T480 User Guide