Step Screw (quantity) Color Torque
2
M2 × 4 mm, small-head, nylon-coated (2) Black 0.181 Nm
(1.85 kgf-cm)
When installing:
Ensure that the connector is attached firmly.
1120 Coin-cell battery
For access, remove these FRUs:
• “1020 Base cover assembly” on page 65
• “1110 Built-in battery” on page 75
DANGER
Use only the authorized battery specified for your computer. Any other battery could ignite or
explode.
Removal steps of the coin-cell battery
76 E490 and R490 Hardware Maintenance Manual
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