I have a Viscount Jubileum 227 digital organ from a pre-owner. The organ plays perfect, but there is some problems with two push-buttons. In the front of the organ below manual I there is some push buttons for the memory bank and one push button "ENC" for the master volume for the organ with the swell only. Many Viscount models have push-buttons like this.
The Memory bank no. 3 does not work and the same goes for "ENC. The pre-owner never used those functions, and did buy the organ new around 1996.
Can I fix it with som kind of claening, or must I replace the unit for the push-buttons?