It may be the line current at those venues.
If you have a lightweight switchmode supply, you can try adding some ferrites to the power cord from the wall. but you almost need to switch to an older style heavy transformer supply for reliablity. It is my guess there is a great deal of noise on the supply current at those vehues you have had problems at. That noise does not play well with switchmode.
SOURCE: Kurzweil piano keys are clicking seems to be worn out.
I don't see you doing any damage by having a look but I would get a piano tuner or repairer in to investigate the problem expertly - no slight on you. But if your Church congregation depend on it it's well worth the money.
Good Luck
SOURCE: I have a Mark V Kurzweil piano - the electrical
Your are likely talking about the input power connector. They are usually a three blade connector in a well.
If the connection is soldered to a circuit board, it has likely gotten bashed in. The circuit board MAY be cracked, but is likely repairable.
Take it to a local electronics repair shop or find one through a music equipment store that deals with pro audio gear.
USUALLY these connectors have "ears" that attach to the case for strength and if the connector has been pushed in the ears likely have broken off. The parts are USUALLY readily available from several sources including Digikey and Mouser.
SOURCE: Kurzweil digital piano unpredictable voices and volume
The contacts of various switches and keys are likely dirty. They are often conductive rubber and need cleaning with 99% isoprophly alcohol and q-tip. Clean both the conductive rubber pill and th circuit board traces they contact.
SOURCE: my kurzweil micro piano will come on and the
Just make sure you are not sending out a midi volume from your keyboard, this could turn the volume down or off. I am not sure what else could cause this. hope it helps.
SOURCE: On power up my kurzweil micro piano has no audio
If the unit uses a wall transformer power supply, verify that it is correct and in good shape. If it is DC and half of the rectifier is gone, then result would be what you are observing.
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