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KENWOOD DNX692 on the radio, the red led light lights up but the radio does not turn on not working

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SAMSUNG 4K on the tv screen but every 3 4 seconds lines appear on the screen flickering

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M12 18C charger the indicator light that is being charged is on but the battery is not being charged

OTDR original battery 7.4v replacement another battery 2 pieces battery 3.7v

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TV works only 7 to 10 seconds, picture on the screen is lost, only the sound is ok

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POWER SUPPLY 52100006 VERSION 1.3 12V FOR Mini Node