I phone 7 won't turn on
I received an iPhone 7 from my girlfriend, that no longer turns on. I have tried charging it with 2 different charger cables and nothing happens. It doesn't show a charging screen or turn on. Our laptop doesn't seem to detect it either, I didn't try using iTunes tho. Is there a way to figure if it's the battery or the charging port on the phone?
*Edit: unfortunately I have just been informed that I had been dropped on garage floor, maybe it's something other than the battery. Does anybody have any suggestions on how I can go about figuring out what's wrong with it?