Won't Charge, Won't turn on, Won't display the battery icon

Hey all, so this is my brother’s iPad that we’ve been having trouble with. As a quick backstory, he dropped it a couple of days ago. Since then whenever we’ve plugged it in, the lightning bolt symbol appears and the battery bar turns green, yet the battery keeps trickling down. We’ve already tried a hard reset and confirmed it was not the cable nor the adaptor itself, and in fiddling with it, it has now run out of battery. At first, the battery showed up as that red ‘low battery’ icon (and plugged in it didn’t have the charger icon, so again, it indicated charging). But now that won’t even show up. It’s just a black screen no matter how many buttons we press or how many hard resets we attempt. As of right now, it’s a brick with zero sign of life. What do you think could be wrong?

Thanks for reading :) x

P.S: I cleaned out the charging port as well with some paper, so that’s all dandy too.