I have a Macbook Pro 13" unibody I purchased in June 2009. Just recently, the headphone jack stopped working. I tested many different headphones and speakers, and none of them work. I am suspecting a hardware issue, because when I plug it in, i head the static while it is being plugged in. However it does not switch the audio. The only thing is, if it was a hardware problem, wouldn't it be stuck in the headphone mode because the switcher is stuck? Thanks!