Disable Dimming?

[GrampaFoundTheCarKey]

I can't find any way to disable dimming on my TV, the model is a UE40H6400AK

The "Eco" options do nothing, I had a look in the service advanced options and it doesn't include any "Picture_2D" options like other sets do only "WBMovie_3D"

Is there any way of requesting a firmware update to include the  "PWM_INI_2D" and "PWM_MOVIE_INI" options?

[PaulyWauly36]

turn Eco off

[GrampaFoundTheCarKey]

Eco is already off and the picture is still dimming itself, an obvious example is credit text over black