Samsung UN43J5200AF

Disable Adaptive Brightness

So far I've still been unable to do this successfully

Picture:
  Picture Mode: Standard
  Advanced Settings:
    Dynamic Contrast:  OFF
    Black Tone:        OFF
    RGB Only Mode:     OFF
    Color Space:       NATIVE
    Motion Lighting:   OFF

  Picture Options:
    Color Tone: STANDARD
    Digital Clean View: OFF
    MPEG Noise Filter: OFF
    HDMI Black Level: LOW
    LED Clear Motion: OFF

System:
  Eco Solution:
    Energy Saving: OFF
    Eco Sensor: OFF