Hello, my car came out of the workshop and the radio didn’t work anymore (no electricity). The boys from the workshop said they weren’t there. I checked all the fuses, but couldn’t detect any faults. I measured the radio plug, there was no electricity, only ignition plus and mass. Therefore, I went out of a cable break and took me out of the fuse box with a 12V power thief. That also worked, the radio went on again. I had two ends ufen installed for front, rear and subwoofer under seat. The one power amplifier goes in Protect (red lamp), the other is ready (green) and here music is running. At some point when I connect cables on and off (e.g. current) both power amplifiers are ready (green), but there is no sound at all. In between, the green luminous power amplifier switched on and off in the 5 sec. clock. Meanwhile, there were permanently stable 11,5-14V at all 3 connections. Electricity and mass I collect directly from the Ba I think it’s very, funny, had the problem that no sound comes before when I connected it half a year ago and it went away when I used to power up and down. After that, the system went. What’s the fault? Maybe on the high/low adapter (because I did have 2 pieces) or on the mistake that no power came to the radio? I’m really stunned. Car: BMW E90 325i, BJ2006, 63,000km