Hi, I have a very good macbook pro which has been working absolutely fine until what must have been yesterday. My macbook charger simply will not charge. It's not one of those situations where the mac says 'not charging' or anything like that, it's just that the charger is not doing anything, no matter where it is plugged in. The light stays black and nothing comes up on the screen. I honestly don't know what's going on. I got the macbook in November 2010, so it's not ultimately that old, either. Please, please help!