I would check to make sure the wall adapter is the correct adapter for starters. It might seem obvious but a lot of people assume the barrel plug fitting is all that matters. It should be pretty easy to find the voltage and amperage you need.
Other than that I would try to open it up or research the model and common issues. A leaking capacitor for example can eat away traces on a board.
I am not sure if this is what you are after but you should be able to enable unknown sources and install it that way.
https://forum.antennapod.org/t/android-auto-compatibility/175