I am having this issue as well.
I have a Epson 2030 projector and hooking up the Roku 3 directly gives me no problem.
But when I use a switcher to get the audio to my receiver (non-hdmi), it's give me the problem.
I use the epvision PHD-VRX2 as my switcher.
From what I've gathered it seems as though if anything in the chain before the display device (be it a TV or projector) is not hdcp compliant, then this issue will arise.
So if your HDMI cable is not HDCP compliant then you'll get the issue.
With that said, I bought some HDMI cables from amazon which don't list as HDCP compliant and I thought well maybe that's the issue.
So I go back to that product page where I bought the cables and one of the reviews says this:
Ryan, all hi speed HDMI cables are HDCP. Marking any HDMI cable as HDCP is a sales gimmick, not based in science. HDCP depends upon the components on either end of the cable, not the cables themselves. These are well made cables and look nice too. I hate to hide them behind my equipment! They have very solid end connectors and mine have a blue and grey tweed fabric look covering. I have several sets of very cheap black ones from a different manufacturer that work OK except for one set that has an internittent connection due to a flimsy end connector. I don't think the cheapies would take frequest plugging and unplugging as well as the Twisted Veins. I work as a DJ and bass player so I work with cables all the time. Cables don't tend to break in the middle but at the ends. These are molded on nicely. BTW, hi speed a HDMI cable works or don't work. The expensive ones (like Monster cable) don't give any better picture or sound and I found that my Monster cables with RCA connectors were just awful because they were too thick and stiff to stay snug in the sockets when plugged in. The same goes for Monster speaker cable. Unless you are going a long distance (over 50 feet) there is no noticeable degradation of sound quality due to wire impedance. Save your money! Sorry Monster.
Even with that, I changed the cable to one that was listed as HDCP compliant and the issue is still there.
So at this point I am pulling my hair out.
It's obviously an issue with the Roku 3 and how it deals with HDCP because this doesn't seem to be an issue with the Roku 2 even in scenarios where the equipment is exactly the same, using splitters and or audio extractors.
I just wish Roku would add an optical and coax out on the Roku 3, this would eliminate the problem, or at least I think it would.
I'm new to the projector world and this need for splitters/audio extractors, and or HDMI receivers and it's truly frustrating.
But hell once I experienced a 120" screen I screwed myself because I can't fathom watching a regular TV anymore even if it was a 60" or 70", they all just look tiny now.
Edited by jnotgsure - 1/20/14 at 5:04pm