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I have no sound from my Yamaha PSR 420. Why?

by Ann Gibson
(Fresno, CA)

I bought a used Yamaha PSR 420 keyboard and was told that the speakers were blown, but that it could be hooked up to an external amp and speakers. I think that the internal amp is bad. Can this be replaced?

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I have no sound from my Yamaha PSR 420. Why?

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Apr 07, 2009
Rating
starstarstarstarstar 		PSR 420 Speakers & External Amplifier
by: Alfred

Dear Ann: Assuming the seller was truthful, the fact that you are able to produce sound through an external amplifier is a sure indication that the keyboard’s amplifier is in good shape. On the other hand, based on the seller’s statement that the unit’s speakers are blown gives rise as to “what caused them to blow?”. From my experience, such damage is rare. Giving the seller the benefit of the doubt, you can either replace the internal speakers or just use an external amplifier. The former solution will require replacement with OEM speakers, or speakers with the same Wattage (power), Impedance (resistance) and Size. Hope this helps.
May 10, 2009
Rating
starstarstarstarstar 		No Sound
by: Anonymous

If you have No Sound, and the VOLUME IS HALF WAY UP or 3/4.. Then Try Plugging in HEADPHONES... Sometimes the Head Phone Jack gets Corroded and The Speakers ON The Unit will Not Kick In.. Hope this helps caryb1999@gmail.com
May 23, 2009
Rating
starstarstarstarstar 		Dud Amplifier
by: Steve W

Yes, I agree. Stick a set of headphones in to see if the amplifier works. If this is OK simply connect to an amplifier via the headphone socket. I've been doing this for years. Be careful to turn the keyboard volume to 0 when first connecting and then set it to half when connected.
Good Luck

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