Possible Causes:
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Batteries are not installed or are installed incorrectly
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Batteries are depleted
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Poor contact in the battery compartment (e.g., loose or oxidized battery springs)
Solutions:
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Replace with fresh batteries — Use 3 new AAA batteries and confirm correct polarity (+/-)
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Clean battery contacts — Wipe the battery contacts and springs with a dry cloth or alcohol swab. Make sure the springs have proper tension
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Secure the battery cover — Ensure the battery compartment cover and sealing parts are fully pressed into place

