Hey I have a Macbook Pro 15" that is 7 months old. All of my problems started last month when my mac just stopped charging. The manager of the apple store just gave me a new Magsafe cord. It was working fine, but now I have to unplug, replug it on my computer to work. Some times it takes twenty tries. Usually the computer dosen't recognize it or there will be a really dim green light on the cord and my mac says 'not charging'. After sometime it will say charging and have a regular green light. Either it will charge on green (not turing amber at all, yet it charges my battery) or it will turn amber and after 5-7 min. will be a dim amber but still charges my battery. What should i do?