[SOLVED] LG C4 TV annoying brightness changes

kaffo
Sun, 26 Jan 2025 22:43:24 +0000

SOLVED
Bit of a long shot here because this is one of those issues where I search for the problem and you get a sea of replies like "have you checked the settings?" or "have you tried changing HDMI cables".

I just got a brand new LG OLED TV and I'm happy, but I've been watching Arcane on it and I notice jarring changes in brightness through the episode.
I'm playing through a native app (Stremio) on WebOS and it's not the source file, I've tested the same file on two different monitors and it's fine.
I went through the settings and disabled every autocorrect and "boost" capability the TV has to try and diagnose it, and the first pass did seem to improve the rate of changes, but it still happens maybe once every 5 mins of watch time.
From what I can tell it seems to be picking up particular colour/brightness changes in the source (Arcane is full of then being so vivid) and when it does, it just changes the brightness of the whole display.
I'm no expert here, I'm also colour blind, so I won't categorically claim it is definitely brightness changing, it could be contract or colour, I'm not sure, but it looks like brightness because the whole picture gets darker or lighter.

I wondered if it was actually flip flopping between SDR and HDR which honestly, it might be. If it is I have no idea how to fix that, as the TV seems to have no option to enable or disable HDR on native apps.

Any advice, thoughts, things to try would be appreciated. I'm technically orientated but I don't really know much about changing picture settings to be honest, I tend to pick the most basic/neutral setting and leave it like that.

Edit: I've dug out the old 4k firestick as suggested and don't get the flickering at all through that. Also running through the guide below helped make the picture look even better! Thanks everyone!
I might yet grab the service remote though and see if I can make the native apps work, then I can retire the firestick for good.

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