Just replaced my older tv w a new 75 Bravia. What I noticed w the Bravia is that I was getting audio but the picture that would intermittently go out and comeback on W continuous audio. I have 6 foot high speed hdmi that goes from receiver into a hdmi wall plate, then there’s a cable in the wall that runs up 4 feet into another wall plate, and finally another high speed 6 foot run to the TV.
to trouble shoot I ran the 6 foot high speed cable from receiver directly to the TV and no issues.
‘so now I’m guessing it’s these wall plates that don’t have strong connection or the hdmi cable in the wall may not be a 2.1. But what gets me is I didn’t have this issue w my older Samsung curved tv?
i Had an issue like this last year in my bedroom w hdmi and it was a pain but got the bedroom resolved.
The problem is that the cable run is too long. With these latest HDMI versions, max standard cable length is 6' to 12', actually closer to six in my experience.
With your upgrade you now need either a hybrid, or fully active HDMI cable. You need to get rid of those wall plates also. You need a clean run with an active cable from receiver to TV. You will also need a voltage inserter to power your cable unless you have a very new receiver with an HDMI HDCP 2.3 version to power the cable. If not you will blow the the receiver HDMI board.
I have a 32 ft. run from AVP to TV and have been using a Ruipro hybrid cable for six years, with no issues. I now have a Marantz AV 10 with HDCP 2.3 and have dispensed with the voltage inserter.
To keep the installation neat, you will likely have to open some walls to place conduit for the HDMI cable. If the cable fails then you can easily replace it. It is a golden rule that you need run ANY AV cable behind a wall that is not in conduit, NEVER.