Subaru forester head unit won't turn off.

Backstory: car wouldn't start yesterday afternoon outside my apartment. Guy taking his dog out at the time said he heard the radio on the night before.

I jumped it with my other car, still, car audio wouldn't turn off. We drove it around quite a bit, tried to factory reset, disconnected the battery. still wouldn't turn off. Disconnected the battery, no luck. I could turn it off manually by holding the power button, but last night the screen appeared to remain backlit.

This morning the car was completely dead. Had to jump it again. Still same issue. Radio wont turn off automatically, and the back light appears to remain on even after turning off head unit by holding down the "off/volume" button.

Anyone have this issue? My next step is to take it to the dealer.