[Keir612]

My 2014 f31, with the Harman Kardon speakers, has absolutely no sound, for audio or warning bongs or reversing sensors and every time I turn on my car, I get a message on the screen saying ” no acoustic tones”. And since then there’s also no radio stations lifted.
I’ve been looking around and the most common cause seems to be the amp. Is there anything I can do to test the amp is faulty?
And if it’s nots the amp has anyone got other solutions? Thanks