I have a really frustrating problem, and I've had it since the day I bought this TV
The TV automatically adjusts brightness. What's even worse is that it does this on already dark screens. Put in a movie, on bright screens press volume up and down and you will not see a difference.
However, in dark screens, press volume up and down, and you will notice that the brightness/contrast is significantly improved! The TV is automatically decreasing contrast/brightness/backlight/whatever, on already dark screens!
I tried accessing the service menu, but did not find any options for CE Dimming or Auto-Dimming or anything of the sort. There are loads of options for backlight/contrast/brightness in the options menu, but none of them resolves the issue of the TV automatically making an already dark screen even darker.
Try running the test yourself on dark screens then bright screens, you'll see exactly what I mean.
Any help would be greatly appreciated, thank you!