I am new here and appreciate the advise. I have an Optoma HD 20 projector along with a Yamaha rx-v367bl receiver and a Comcast/Motorolla DCX3400 DVR. When I pass the HDMI directly to the projector it works great. When I pass it through the Yamaha receiver I get an error code on the Motorolla DVR that reads DU1 or as I have seen in trying to research this is that it is trying to say DVI. The image will come up at 720P after a while but if I change channels it starts the process all over again. I assume the issue is a setting in the Yamah receiver I just couldn't find anything to guide me to the right solution. Any ideas? Thanks.