Hopefully this is a quick fix and I am overlookinng something. I am trying to play a DVD and there is no sound. I try to adjust the volume and normall where it shows the bars of volume on screen as I make adjustments it shows me a circle with a line through it. I tried to volume up and down and the same thing. I restarted my computer but it did not help. I also opened iTunes to see if I could play a podcast and it will let me pick one but it will not play or advance through the song/podcast. It is frozen there. Any advice?