I have seen this issue mentioned a few other places but no out come other than to give up and use a different set up. The issue is running a Roku stick + through a Samsung soundbar. Randomly the video signal will be lost. Sound continues to work. The frequency can vary from every few minutes to 30+ minutes. Video signal can be lost for a few seconds to a minute or more. Other input sources don't have this same issue. Setup is Roku plugged into a powered HDMI switch, HDMI from switch to soundbar, then spundbar to projector. Have a playstation 3 plugged into the switch as well and it has no issues with losing video signal.