Hi
Since I have to be driving a lot daily, the phone and music is a necessity. Of late I landed into a very difficult situation wth my B&M. The system won't just respond, whether to phone or to USB music. I guessed it was dead. It happened like this. Since the past couple of weeks, I would notice that the song being played from the USB port would just stop and the audio would changeover to radio. I thought may be there could be some error in the USB, which I would try and correct using a laptop. Last week, the odometer started flashing. I remembered that the last time this happened was about a year or so ago and before I sent the car to the garage I would try the internet suggested method of removing the battery terminal and plug it back in after about half an hour. It worked then. But not this time. Got battery checked, no issues.

I also noticed that the display on Blaupunkt system shows AUX. Didn't understand what it meant but slowly I started realising that perhaps the B&M unit has gone toast so instead the system goes over to AUX. Also none of the B&M buttons on the steering worred.

Being an engineer myself I thought let me at least check the module. I opened it and found one of the chips on the PCB sort of burnt (well, looked like it).

I got the B&M replaced but the mode switching over to Tuner still happens, sometimes pretty quickly and sometimes after playing for a while. Nothing about the pen drive or the song format has been changed and I have been listening to these songs for over a year now. I called Fiat and they said they'll check!!

This morning I suddenly realised that the SRC / OK button could be the culprit, perhaps since it is a switch of some sort, it may be misbehaving by changing over modes all by itself. But again, if that were the cause, wouldn't it also change over from tuner to another mode?
Currently I am driving without the module plugged in.

Any advice would be appreciated.