Step Screw (quantity) Color Torque 2 M2 × 4.6 mm, big head, nylon-coated (4) Black 0.181 Nm (1.85 kgf-cm) When installing: • Ensure that the connector of the speaker assembly is attached firmly. • Route the cables as shown in the following illustration. Attention: As you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. 1120 Built-in battery 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 Important notices for replacing a built-in battery Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use. Lenovo provides a diagnostic program to do an automatic battery diagnostic test, which can determine if the removable battery is defective. A removable battery FRU should not be replaced unless this diagnostic test shows that the battery is defective. The only exception to this is if the battery is physically damaged or a customer is reporting a possible safety issue. Chapter 9. Removing or replacing a FRU 79