You may be experiencing loss of tones on your keyboards or pedals. There are 9 contacts under each key including the presets. Thats 720 per keyboard,. If you lose connection on a preset key, you will lose that one drawbar on every playing key. IF you lose contact under a playing key you lose one or more of the 9 available drawbar tones. The greater long term danger is that now the bussbars cannot be shifted as originally intended by Hammond because the problem could end up even worse. The proper way to repair this is to do a buss bar clean/lube job. Then shift the bussbars to a new spot. Call me for pricing and details. 704.798.0299. In most cases the results are 100%.