HDR content starts dark, then flickers into life

Associate
Joined
18 Nov 2008
Posts
2,430
Location
Liverpool
Setup
TV: Hisense H65M7000 (4k HDR10)
AV Receiver: Pioneer VSX-932 (4k HDR10)
Content player: Nvidia Shield (2017 edition), connected via Gigabit ethernet, running Plex client
Content provider: Windows server, connected via gigabit ethernet, running Plex server

Problem
When watching HDR content, there is a 50:50 chance that the content will start looking incredibly dark. If this happens, there is then a further 50:50 chance that it will flicker / flash after a few minutes, after which point there is a chance it will go back to looking dark, or it will look fine for the rest of the episode / movie. After putting up with this for months I finally set up a camera and managed to capture an occurrence: https://giphy.com/gifs/Mdoq4MZ2Jbs2gwSnCe

Here's a before and after comparison in case it doesn't come out well in the GIF: https://i.imgur.com/ZCdWOdJl.png

The difference looks minimal here because the scene is bright anyway (plus of course you're seeing a bunch of internet compressed edited screenshots of a video recorded on a phone!), but in darker scenes it can honestly be almost impossible to see some figures pre-flicker.

I've no idea what part of my hardware chain the issue is coming from, and I'm hoping one of you can help me narrow it down?
 
My guess would be some kind of back light issue/panel fault. I would try updating firmware if possible it could be a buggy HDR implementation.
 
My guess would be some kind of back light issue/panel fault. I would try updating firmware if possible it could be a buggy HDR implementation.
No newer firmware available sadly... and the TV is out of warranty. Though given the consistency with which it happens it seems more like a software issue than a hardware one?
 
It could be but without a firmware update it's as good as a hardware fault, I would probably try emailing Hisense.

Are you using a rated HDMI cable? do you have another HDR source to test with to rule out your Bluray player?
 
Back
Top Bottom