HDMI patch cable incompatibility?

[alex75871]

I have a media panel installed in my house which allows me to plug my devices into the wall outlets and have the outputs available behind the TV so no cables are visible. Essentially all cables are patched through the wall. Everything works well except the HDMI cable when running HDR. My TV goes blank when my media device switches to HDR. If I plug the HDMI cable from the TV directly into the media device (bypassing the patch lead in the wall) there is no issue. Is there an incompatibility between the HDMI cable patched through the wall and HDMI cable I am plugging into the outlet? I don't know what HDMI standard cable has been used in the wall because I did not install it. Is there incompatibility between HDMI cable standards when patching? Or could it be something else entirely?

[johnny5c]

I just ran into the same problem when I upgraded my parent's projector, they built their house with a home theater in 2005 when HDMI 1.2 was the standard.  I replaced the original Sony 1080p projector with a new 4K model and the exact same issue happened, regular HD worked fine but the second you enabled HDR it went blank.  I have a new temporary 2.0 cable running from the A/V rack to the projector and everything works but going to have to replace the in-wall run sometime this winter.

[circeseye]

when it comes to 4k hdr, cable length or type matter. on copper hdmi over 6ft the signal starts to degrade. so if keeping copper you need a booster. other wise its highly recommended to go "optical hdmi" over 6ft.

the screen going black is a symptom of signal degradation

theres a lot more bandwidth going through the cables with 4k. but ive seen older hdmi cables work fine sending 4k video. but again length is the crutch

 

[alex75871]

14 hours ago, johnny5c said:

I just ran into the same problem when I upgraded my parent's projector, they built their house with a home theater in 2005 when HDMI 1.2 was the standard.  I replaced the original Sony 1080p projector with a new 4K model and the exact same issue happened, regular HD worked fine but the second you enabled HDR it went blank.  I have a new temporary 2.0 cable running from the A/V rack to the projector and everything works but going to have to replace the in-wall run sometime this winter.

 

14 hours ago, circeseye said:

when it comes to 4k hdr, cable length or type matter. on copper hdmi over 6ft the signal starts to degrade. so if keeping copper you need a booster. other wise its highly recommended to go "optical hdmi" over 6ft.

the screen going black is a symptom of signal degradation

theres a lot more bandwidth going through the cables with 4k. but ive seen older hdmi cables work fine sending 4k video. but again length is the crutch

 

Thank you for your responses. The cable run is quite short (about 3 meters) so it must be an old standard that has been used that can't handle HDR on the 4K TV.