前提条件：Nest Learning Thermostat 2nd Generation Battery Replacement

1. Nest Learning Thermostat 2nd Generation Motherboard Replacement
2. Nest Learning Thermostat 2nd Generation Optical Finger Motion Sensor Replacement
3. Nest Learning Thermostat 2nd Generation Auto-Away Sensor Replacement
4. Nest Learning Thermostat 2nd Generation LCD Screen Replacement

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