So I have been working on my 2010, bose w/ Nav coupe for the past week. I removed the original bose amp and some wire that came with it. I set up my new audio system. However, Now when I start the car the "AV control unit" (headunit) wont power up(the screen or main system. I can hear the HDD spinning, but no image. I tried cycling through the multiple sources, but still no sound. I am assuming it's not getting power. So I went back and looked at the cabling and everything looks good. I had to unplug it for a few days to work behind it. Could something have happened during that time?

 

Missing ground perhaps?

Have you checked the electrical schematic and wiring in the FSM?

It's only battery and ground.

Telcoman