Hi, Wonder if anyone can shed any light on this problem - first time i have ever come across. I have a Intel 2 MacBook Pro. There is no sound coming from the speakers even though it is not muted and the vol is turned to the max. There is sound coming if i plug headphones in the jack. Just noticed that there is a red light coming from where the headphone jack is...anyone have any idea how i can get my speakers to work again? Massively confused - help appreciated.