A key has stopped working on my digital piano, but it was working just fine before. All of the other keys work except for this one. I already tried changing the volume, and turning the power on and off, but nothing's working so far.
SOURCE: I have a Technics digital piano with 1 dead key.
If your piano is the same as mine, there is a rubber membrane with contacts imbedded in it that sits on top of a circuit board. The key pushes the contact in the membrane onto the contact causing a note on. What happens is the cylindrical part of the membrane that holds the contact can get torn and the contact will no longer travel in a straight line to trigger the note. The entire membrane strip has to be replaced. The strip on my piano was discontinued and I had to manufacture one from an extra Roland membrane that had some bad contacts in it. You will have to contact Technicsat www2.panasonic.com/webapp/wcs/stores/servlet/PNAEndecaSearchCmd for support. If you don't feel comfortable tackling the repair yourself consult a good piano tuner/repair place in your area for advice.
SOURCE: casio ct 636 e-piano LOW volume on all keys and instruments
Sounds like the built in amplifier is going down. You could put it in to a music shop and have it repaired or buy a small 10 watt amplifier and plug in from you headphone socket to the amplifier. I suppose it depends what is the cheapest way to go and how much you are prepared to spend as the keyboards are pretty cheap nowadays especially on Internet shops.
Good Luck
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