I looked but couldn't find what it was actually outputting anywhere.

The status always says pcm regardless of what setting I choose.

I tried factory reset, it didn't work.

These are the specs for my box that is working:
MP3/WMA/AAC/WAV/OGG/AC3/DDP/TrueHD/DTS/DTS/HD/FLAC/APE

They are pretty much the same except the working box has dts.

I had another android box that was brand new in the box, it was supposed to be a gift for my brother in law but I hooked that up to try it and it doesn't work either. It has the identical specs to my box that is working.