I have searched endlessly for a fix. I know this has been addressed, but I have not seen my exact problem. I just purchased a Mini Display to HDMI w/Audio Cable from MonoPrice. The video works fine, I am able to see and select my TV from the Sound Output in System Prefs but I still get no audio. I can click through the list (headphones, built-in and my 2 Airplay devices) and they all work while the video plays, I just never get the audio when I select my TV. Any ideas? I have a mid 2010 13-MBP (7,1) Thanks.