I have a 2013 Nissan Altima sedan without nav, some of the radio buttons just stopped working. Has anyone ever heard of this or seen it happen, its the seek and track, the FM\AM CD AUX, the presets , and the DISP\RPT button. Everything else works and it works from the steering wheel. I don't know what it could be, Ive checked the fuses , disconnected the battery, and pulled apart the head unit and blow it out and nothing. Any advice would help. Thanks