Hi all, I have a 2007 MacBook with a MagSafe adapter. Yesterday I noticed my adapter was plugged in but the computer was running on battery life. A little adjustment and it started again, but it said "Not Charging". I've noticed a small tear in the cord on the MacBook end with some exposed wiring. The computer continues to flip between "Not Charging" and battery life whenever I move it slightly. I'd like to get this fixed without having to purchase a new adapter, since I plan on selling the computer soon, Is there anything I can do?