Strange issue with AMI/cd changer

So… None of the electronics in the glove box have worked since I’ve owned the car; I was more interested in hearing that lovely exhaust note! Had some time to drop the glovebox over the weekend (car back from the body shop!), and noticed they’re both plugged in with the “analog” plugs on the back but both opticals are pulled out with loopbacks installed.

Unplugging either of the loopbacks kills the whole radio, display and center console buttons. Cycling ignition sees the console lights light up along with the audi logo on the display and then………nothing. Dark.

I tried both plugged in and plugged in one at a time and neither unit seems to be working. Does AMI need a working changer to function? Pretty sure the changer is dead; doesn’t even light up, but not sure about the AMI.

Anyone have any ideas?