I have seen this issue with my X994. Eventually, the problem spread to all other buttons. I cleaned the external terminal connections with a toothbrush. I also opened the face plate, and cleared dust with a can of compressed air. None of this helped. Apparently, a lot of people have had the same problem with these Kenwood units. They're basically disposable. I bought a Pioneer DEH-80PRS and have been much happier since then. I would not recommend these Kenwood Excelon units, any model all way through X996, to anyone unless the intention is to replace them every couple of years.