I would appreciate any help I can get... I was listening a video on my MBP and everything was working fine. I then put my headphones away when I decided to listen to something else so I was what the heck I will just use the speakers but it seems as if they are turned off or something. I keep trying to put the volume up and down and it just comes up with the speaker picture with a circle and line through it. I looked up at the volume in the bar and it is grayed out at fun volume. When I plug in my headphones, the volume turns black again and allows for adjustment. Did I accidentally turn off my speakers? How do I turn them back on or fix this? Please help. They were working totally fine earlier today but now they are not.