The only quick thing you can do is check the electrical connections. You should be able to do that by simply removing the seat and the top shelter to which the radio is attached. I think that would likely fix you issue. It sounds like an intermittent contact. I would pay particular attention to the antenna connections. They don't have any locking mechanism. There will be one right on the radio under the top shelter and one under the seat that then runs over to the antenna. Also make sure the ground connections are tight. The one that grounds the radio to the frame screws into plastic on the top shelter so don't over tighten.