I finally did the 56 pt.convergence on my 50H81 and thought all was well until I popped in a DVD and noticed NO audio coming through the tv speakers. I turned on my receiver and voila! Loud and clear! NO, I didn't have it on "mute" or "1/2 mute." And it only occurs when playing a DVD on what Toshiba calls ColorStream HD1. I can go back to regular tv on "ant"(enna) and the OTA signal has audio. The only thing that I can think of that happened was while I was doing the 56 pt., I hit the #9 which produced bright vertical bars. As soon as I realized what I'd done, I hit 9 again and the bars were gone. This was like in a 2 second window. Please HELP!