My Apple TV wont connect to wifi or ethernet

Im trying to figure out a situation with a used Apple TV 4th gen. When I received it, it would not connect to the internet through wifi. I connected it to ethernet and still nothing. I did a reset of the device through iTunes and still nothing. If I leave it connected, though, it will connect to internet just for a few seconds. I have gotten far enough to where I connected it to my account but thats it. I have tried Airplaying stuff to it to no avail. Any ideas?