Hi. I too am going to ask a question that has probably been answered many times before in this thread, but here goes.
I purchased the X550 in the spring of 2016. I spent quite a bit of time several months after that downloading software, color profiles, the whole nine yards. Since that I have watched 1080p sources on the projector and they have been excellent.
Early this year I purchased both a LG 4K OLED television, as well as an OPPO UHD player. I kind of made the decision that for the 4K movies I was going to watch it would be on the LG. I have 5 current 4K movies, and each of them activate HDR on the TV when played. I decided a few weeks ago to start using the JVC for these 4K movies. When I watch I noticed two immediate things: I saw no evidence that HDR was enabled, and the picture overall was noticeably darker than when displayed on the LG.
My guess is that either:
1) HDR is not fully supported on the X550, at least the type of HDR these 4K movies have
2) HDR is supported but the JVC is not detecting it
3) HDR is being detected however I either don't have the proper color profiles loaded, or something else is wrong.
Please that non-HDR 4K sources streaming from Netflix in look amazing, every bit as good as my LG displays them.
What is happening here?
Projector/Screen: Sony VPL-VW285ES; Da-Lite Cosmopolitan Electrol (92")
TV: LG OLED 65B6P
Amplification: Anthem MRX-1120; Aesthetix Mimas; Rogue Triton II
Sources: Pioneer UPD-LX500; Simaudio 260DT; Music Hall mmf-9.3; Goldring Eroica LX
Speakers: Wilson Yvette (L/R); Paradigm In-Walls (6); Hsu Research VTF-1 MK3 (2)