Question about Yamaha Portable Keyboard with 61 Touch-Sensitive Keys and General MIDI
Try placing your ear on the speakers, adjust the volume control up and down several times, you should hear a humming sound that goes up and down. if not problem with the stage before the amplifier, that is the sound processor. if you dont hear the hum. problem with the amplifier and speakers, including the sound ports or jack. dissassemble the unit. look for loose connections from speakers to amplifier.
Posted on Jul 14, 2009
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Posted on Jan 02, 2017
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