Originally Posted by psurob12
they are twisted veins, about a year old, so that may be my issue.. Contacted Yamaha support and they recommended getting some premium certified HDMI cables, as they've seen a lot of this kind of thing with this unit.
Ordered 3 from monoprice and hopefully that will resolve the issue. Fingers crossed.
AnyNet+ is on, but if I turn it off the soundbar disconnects completely.
I just went through trying to diagnose a similar issue with a friend's (KS8500) TV, xbox one S and Yamaha RX-V779 receiver. There is another setting in your Yamaha soundbar (page 95 in the online manual) that suggests turning "on" HDMI Control: --- When connecting ARC (Audio Return Channel) supported TV and this unit using an HDMI cable only, set “HDMI Control” to “On”.
We were also having issues getting the xbox one S to recognize the TV's HDR capability when connected through the Yamaha until we changed the 4k Mode in advanced settings to Mode 1 (in Yamaha settings) as has already been suggested.
For anyone using a Yamaha receiver, there may also be an advanced setting (MON.CHK) that automatically detects video resolutions supported by the TV when connected via the HDMI OUT jack. Setting this to "skip" was also necessary to resolve issues.
Even after getting the xbox one S to run a successful compatibility test for the TV with all the 4k and HDR boxes checked while cabled through the Yamaha, we still had an issue whenever a 4k UHD BD disk was played. It would start normally with HDR enabled (finally, YES), but would soon start to flicker or pulse the image displayed on the TV and the display on the Yamaha would fluctuate like is was unable to lock on a particular sound format.
What turned out to be our solution, after much hair pulling and research on AVS and elsewhere, we swapped out the HDMI cable that was supplied with the xbox with another new cable that was laying around and BAM - everything worked fine. We had previously swapped out other cables, but not that one.
Sorry about the long post, but as a long time lurker and non-professional noob, I just wanted to share my experience and to state my appreciation for those members here on the forums that patiently provide extremely valuable help to those of us that don't know anything technical about these topics and mistakenly just sort of expect our equipment to "work."