Removal steps of the coin-cell battery When installing: Ensure that the connector of the coin-cell battery is attached firmly. 1110 Speaker assembly Note: Before you start the servicing, disable the built-in battery. See “Disabling the built-in battery” on page 64. For access, remove these FRUs in order: • “1010 Removable battery” on page 64 • “1030 Base cover assembly” on page 65 Removal steps of the speaker assembly 78 T480 Hardware Maintenance Manual