I've had my Optoma projector for a couple of years now, with no other problems, but from Day 1, it's had a mildly-annoying signal flicker whenever I play streaming video from my Roku 3 device. The flashing/flicker is exactly like what is seen on this guy's YouTube video: I've gone into the settings for both my projector and my Roku, but haven't found anything that could solve the problem (unlike the "Deep Color Output" setting on the YT guy's PS3 console, which solved his problem). There's no flicker when I play the Roku on my old Panny plasma, nor any flicker on the Optoma projector when I stream Netflix and Amazon Prime through my Sony Blu-ray player's streaming options (or Netflix streaming through my Dish Network receiver). All of these options go through my Sony A/V receiver, via HDMI, to my Optoma projector. However, I'd prefer to stream through the Roku 3, since the interface is much faster and less clunky than the Blu and Dish options. Anyone have an idea of what could be causing this, and a possible fix? Thanks in advance.