A few people have mentioned ARC problems. If you are having problems with plain ARC, as opposed to eARC, try using an HDMI cable with ethernet.
Plain ARC is supposed to work over any HDMI cable so you should only need an HDMI with ethernet for eARC, but after years of never being able get ARC to work with my Denon receiver which is from 2013 I happened to notice that in the manual it said that for ARC to use a “Standard HDMI cable with Ethernet” or “High Speed HDMI cable with Ethernet”. I switched to a "with Ethernet" cable and ARC worked.
Plain ARC is supposed to work over any HDMI cable so you should only need an HDMI with ethernet for eARC, but after years of never being able get ARC to work with my Denon receiver which is from 2013 I happened to notice that in the manual it said that for ARC to use a “Standard HDMI cable with Ethernet” or “High Speed HDMI cable with Ethernet”. I switched to a "with Ethernet" cable and ARC worked.