Hi Guys,

Having a problem with the picture brightness. Switching the TV on to watch a live program such as Euro 2020, This Morning, The One show etc, I am noticing that after a short while the screen goes dim. Flicking to another channel and then returning brightens the picture for a while before it dims again.

I have checked eco, and ambient light settings and they are set to off. I cannot find anything else that could cause this. Have I got a rogue ambient light setting, or is auto brightness control playing tricks? 

Any help would be appreciated.

Thank you

Graham