Hello, When I plug my macbook in with the magsafe, the led on the magsafe does not illuminate, and my macbook wont charge. My mac shows its plugged in and getting power. When i click on the battery is says "Battery is not charging, Power source: Power adapter" And if I unplug the macbook, it will still work on battery power. I already made an appointment with the genius bar for later tonight but maybe someone could help me first.... Thanks.