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Replaced all batteries and fully followed instructions for synchronising transmitter with receiver but doorbell Z30914 - IAN 89970 still not operating ! Does it have a fault that cannot be corrected ? Submitted on 4-6-2021 at 16:52
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that 2 battery1,5v can be removed with 3vdc source ? Submitted on 3-7-2020 at 14:24
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