Did you drop it before you started having problems? There are screws that hold a little piece of metal over where the battery clips to the mb. But if seen instances where a drop can dislodge it just enough to short out. You can buy or make a screwdriver to take the back cover screws out and investigate it yourself. (Only recommended if you know what your doing). Or you can take it to an apple store or a repair store and see what they can do. Good luck!