Hoping someone can help. With no notice, my JVC RS4910U stopped displaying from my ROKU. I tired different HDMI cables and both projector inputs. Tried a brand new Roku unit...same issue. I tested the Roku units on other TVs and both worked fine. No matter what I try, I get "no signal" displayed in the upper right corner of my screen. After testing everything I could think of, I switched to my DirecTV signal. When I adjusted my resolution settings on my DirecTV box, I found the projector will no longer display a 480 or 720 signal...the screen just remains black. I only get a picture when the DirecTV box is on 1080i or 1080p. I went through every menu setting on the projector and have found nothing to correct this issue. What I believe is happing is the original ROKU menu signal is not 1080 and therefore nothing shows on the screen, therefore I cannot "force it" to 1080p via menu as there is nothing on the display to see. While I have forced the Roku unit to 1080p when connected to another TV, as soon as you unplug the Roku, the setting convert to standard, so that does me no good.
Has anyone heard of this issue with the JVC RS4910U not displaying lower res information?
Thanks in advance for your input.