Hi. Long time lurker, first time poster. I've recently bought a Sony DH790 in preparation for installing some Atmos speakers. I've set it up and everything's (mostly) fine, apart from one issue. I don't get any audio/video from the TV input. I'm using a high speed HDMI cable from the ARC port of my LG B8 to the eARC port of the AV. The GAME port has the PS5, the MEDIABOX port has the Shield, and the BD/DVD port has the 4k player. Everything here works great. Select GAME, and the PS5 appears, select MEDIABOX and the Shield pops up, and so on. But when I select TV, I get a blank screen. I can still watch TV by selecting Live TV directly on the B8, but why isn't it showing through the Sony AV? Or am I being stupid and it's doing exactly as it should? I've scoured the internet but can't find an answer, so hoping someone here knows. Thanks.