Hey guys, So I have a 15" Macbook Pro and the other day while trying out a subwoofer I got, it started playing only out one side of the headphones or speakers. I know it's not the headphones cause I've tried it on other devices and no matter what is plugged in to it, on only comes out one side. From the forums I've read it doesn't seem to be a sound card or the logic board, otherwise it wouldn't be working at all. The most logical explanation is that the connection inside the jack is messed up. Does anyone know how to fix this without having to take it in? Even a diagram of inside the headphone jack would be appreciated. Thanks.