So my Mac book won't play any sound unless the headphones are plugged in. Theres all the same problems with the icon on the screen being grey, and the red light in the headphone jack. The only problem is, nothing anybody has said has worked. It's like the speakers sitting inside it don't exist. Not even going into the Audio MIDI Setup did anything. And I didn't do anything new to it. I didn't update the soft ware, I didn't drop it, I didn't get it wet, it just seems to have stopped working. HELP! My lap top is my baby I need help real bad!