Hello all, I really hope someone can help me here.

stereo: nakamichi NA6800 running android 6.0

I installed this unit for my dad, I'm pretty sure my wiring is good. When I play music/videos from a usb drive, there is no audio. Same thing with bluetooth and with an aux cable, I see the song playing but no audio at all, which is weird because the audio on the radio works just fine.

I tried messing with the settings, could not find anything. Reset to factory settings, nothing. Reset with a paper clip, nothing.

I thank you in advance!