We have a sharp aquos hdtv, samsung bluray and samsung bluray. The bluray has one hdmi out which goes into the tv. From the tv we have a digital optical cable going into the sound bar as this tv does not have and audio out hdmi. We set this up about two weeks ago tested the hdmi and our roku all working well with video and audio. Since the set up we have only used the roku until last night we went to watch a movie and all that was transmitted was video. When i changed the hdmi to a different input we had video and audio once again. Today while watching the roku hald way through a show the audio went out. Again changed which hdmi input was being used and we instantly had audio and video again. Any ideas what is going on? Just a cable issue or something with one of the components?