Faulty connection on MacBook Pro charger.

My MacBook Pro now is like a very special desktop that I cannot move. If I do that it stops charging and suddenly looses power and is able to work again only if the connector is set to certain position with some weight on the cable. I already replaced the charger for an original one and I saw the DC in board. Do anyone know if that will fix the problem, the conector seems to have some paint peeled off and some pins kind of black. I needed to replace the first adapter because the cable burned and got cutted. It is a slow laptop now but still works fine and would be a great gift for my little boy.

Thanks in advance