My Roku is connected to TV via html. TV is connected to PC via html. When watching TV (not Roku) TV sound is working and sound device is Sharp/HTML. If I switch to Roku through TV's device selection and watch any particular channel, sound is working as expected, but, when I switch back to the TV sound is not working and device Sharp/HTML is no longer listed as a installed device. I also selected show hidden devices and still not there. Sometimes, and not always, if I leave Media Center playing on TV and switch over to Roku, on return to TV, sound will still be working. If not I have to reboot PC in order to get sound back. FYI - yes I am still using Win 7 with Media Center and Roku 3. Thankyou
