Hey, guys. I've got a problem with my sound. When I plug in my headphones, the sound icon in the menu bar goes gray and I can't alter the volume in any way. There is NO red light in the jack (I've read where this can be a problem). When I look at System Preferences > Sound under Output it says "Settings for the selected device: The selected device has no output controls." The name is "Digital Out" and the type is "Optical digital-out port." I can't alter the sound at all in this section, and mute is not checked. The Input section looks fine. Does anyone have any suggestions? I'm freaking out a little.