HIKVISION iDS-9600NXI-I8/8F(B) Series User Manual page 26

Batteries are installed correctly and the polarities of the batteries are not reversed.
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Batteries are fresh and not out of charge.
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IR receiver is not obstructed.
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No fluorescent lamp is used nearby
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If the remote still can't function properly, please change a remote and try again, or contact the
device provider.
Network Video Recorder User Manual
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