My guess is that it was a bad Hopper. But the OP needs to come back to clarify.SO, IN CONCLUSION (WITH ALL OF THESE OTHER PEOPLE HIJACKING THIS THREAD), DOES THE H3 HAVE A VIDEO PROBLEM OR IS IT JUST CERTAIN TVS NOT SET UP PRPPERLY OR RANDOM CONNECTION PROBLEMS. AFTER 6 PAGES, WE HAVE HASHED AND REHASHED EVERY CONCERN.
Anybody who suggested "bad fittings", coax quality or HDMI cables is just flat wrong. If you see a picture and hear the sound, it ain't the hookup. Its either the TV or the Hopper (and if I was there I could tell you which one in less than a minute)
Now to take the thread BACK off track, (but one that has been running through it by me) here's the latest on the LG OLED and HDR circuits. After first tripping the switch, then not tripping the switch, then tripping the switch again, I woke up to it NOT tripping the switch this morning. THIS time I did a soft reboot of the Hopper via remote, and when the Hopper came back, the "HDR is now on" banner came back. So it is a buggy bug, not a consistent bug.
But here's the thing (and only anecdotally) I'm beginning to think that it actually IS a better picture when the Hopper is tripping the TV's HDR circuit.