Possible that the analogue to digital converter is faulty, possible failure of the potentiometer and the motor drive.If the volume does increase with the remote then it is possible that the POT or the circuit to it is faulty. check this D/A converter.
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Possible that the analogue to digital converter is faulty, possible failure of the potentiometer and the motor drive.If the volume does increase with the remote then it is possible that the POT or the circuit to it is faulty. check this D/A converter.