All my computing and AV kit has a wired Ethernet connection to my local network. Both my primary Windows 11 workstation and an Intel NUC 8i3CYSM also have HDMI links to a Denon AV amp, which is connected to a 65" LG OLED television. For several years, I have been successfully using the Intel NUC as an HTPC to play rips of my Blu-ray collection on the TV (which acted as the Windows 11 display for the NUC). However, the NUC's HDMI output has stopped working and it is no longer usable.
Rather than fix or replace the NUC, I have decided to use my workstation PC as the HTPC. Windows is configured on this computer to use the TV as its third display, though I seldom use that option as my back is to the TV when working at the computer.
The most obvious and convenient way to exploit my workstation as an HTPC was to select my 'LG OLED65 TV' zone in MC 32 (a zone I have never used before), but the video quality was disappointingly poor. In contrast, if I start playing a video in MC, detach the display and then drag that display to my third display (the TV) then I obtain the video quality I was expecting.
Can anyone explain why my TV zone might be degrading the video?