Did I just fry my aftermarket head unit?

I purchased a Kirinavi android head unit and installed it in my 2010 Prius using the factory speaker plugsw/ wiring harness (no separate amp).
Everything worked for several months, but I was receiving terrible FM radio reception. I opened up my dash and found an antenna booster wire which I attached to the blue 12v Antenna Power wire on the kirinavi.

My solution worked great. I got much better radio reception. However, on my first drive I went over a few bumps and all sound went out. I opened the dash again and the blue Ant Power wire had come loose. Now, no matter what I try I cannot get any sound from the head unit. There is a slight pop from the speakers when I start the car and then nothing.

My only guess is that the loose 12v Antenna Power wire touched something in the Kirinavi that stopped the head unit's amp from working correctly. Do you have any recommendations for testing before I break down and purchase a different head unit? It seems the factory speaker out (I don't have an amp) no longer provide sound. And I tried hooking a pair of headphones up to the RCA pre-amp outputs, but I couldnt hear anything there either.

The fuse on the Kirinavi is fine. And the head unit turns on and functions correctly - just no sound.