Need help with my TCL R625 Roku Television and Dolby Vision (2 Viewers)

[Brian Husar]

I have a Panasonic DP-UB820 4K UHD Blu Ray player and I have a TCL R625 Television. I previously had a Vizio and did not have the same issue. Any time I play a disc that is Dolby Vision, the television seems to do some sort of auto dimming and brightening, some times shot by shot. It doesn't do it on streaming with Dolby Vision, or discs with HDR 10. Only discs that have Dolby Vision. I don't think it's the Panni because, like I said, I did not have this issue with my Vizio. I wanted to upgrade from a 50 inch to a 65 inch, and my boss at my job got a bunch of TCL televisions, and he needed to give this one away. It was unopened and still in the box. I have tried all of the secret TCL menus, I know there is stuff on line about turning off dynamic back light control, but I don't seems to have that secret menu that allows me to do that. Has anyone heard of this issue? Oh, I do not have this issue if I put the blu ray HDMI cable into HDMI ARC.

 

[Malcolm R]

The manual says you should be able to get to the dynamic contrast and backlight settings in the Advanced Picture Settings menu:

I have a different brand but I know mine will do similar things if I enable some of the backlight modes or ECO mode.

 

[Brian Husar]

Thanks, I have turned off the local and dynamic contrast and it still does the dimming issue. I need to download the manual.

 

[Al.Anderson]

This is a shot in the dark, but I remember this kind of thing happening when the TV was trying to process a signal from the player that wasn't native (so had to scale). So maybe check what your player is putting out.
Also, it couldn't hurt to try another HDMI cable that you;re sure is spec'd for 4K.

 

[Brian Husar]

This is a shot in the dark, but I remember this kind of thing happening when the TV was trying to process a signal from the player that wasn't native (so had to scale). So maybe check what your playing is putting out.
Also, it couldn't hurt to try another HDMI cable that you;re sure is spec'd for 4K.

Thanks. Ordered an HDMI cable that said compatible with Roku TV’s and Dolby Vision