Is this the only manufacturer of 2.1 chips? I wonder...There's a little 2.1 (8K) just beside the 1140 in the first picture.
Maybe it has to do with this?
The quick rundown: 2020 AVRs with HDMI 2.1 Panasonic chips seem to display a black screen when pushing 4k/120 and 8k/60 through them. This is a hardware problem, so no firmware updates will fix it. Marantz, Denon, Yamaha use the chips in their 2020 and upcoming 2021 lineups. Sony, Pioneer and...www.avsforum.com