hey guys spent like $900 on a amazon fat tire ebike 2 days ago. since. im able to hit the power button and nothing happens, display doesnt turn on at all. if i remove the battery and put it back in it will turn on. (its a folding bike with removable battery). Im then able to ride. when I put it back in my garage for like 20 minutes or more OFF. it wont power back on at all until I remove the battery and put it back in and refold it. it really sucks. what could this be? Ive checked the physical connection and it looks fine to me