I have a Macbook Pro, can't remember what year. My mac randomly doesn't charge sometimes, in the last while it chooses not to charge more often than usual. The green/orange light isn't on. The menu on the computer says "The Battery isn't charging." And when I plug it in, the computer screen gets brighter and the battery has a sign on it as if it recognizes that the charger is plugged in, but it's not lighting up and not charging for some reason. When I keep it plugged in like this the battery doesn't get any lower, but it still isn't charging at all. And sometimes if I unplug it and replug it a bajillion times I can get it to charge, but it's getting worse, not working at all right now. I've tried 3 different chargers on it and none of them are working so it's not the charger. Please tell me what to do. I am not a techy computer person so please tell me in laymens terms.