I have had an intermittent fault regarding the sound (all speakers) It went on and off randomly, especially when leaving the car (sound working) return to car, not working. I've re-booted, did work, now doesn't. Also checked connections, fine. It has now come to the stage when the sound is mostly off. The rest of the unit works fine, just the sound missing. Unit faulty or something else? Any help appreciated. Unfortunately car out of warranty by 1500m.
