Why is the board over hitting?

I’ve seen this issue a few times before. Few questions: What kind of battery/charger are you using? Do you notice a specific area getting hot? When does the heating occur?

If it isn’t a fault in the board/connections, I’ve seen success by changing out the charging part. If it’s a fault in the board, the controller is probably a loss unless you are super handy with replacing the tiny components on there.