What about the rest your settings? In some cases, this is caused by the television being in a shop mode. Try changing your energy savings mode again, and this time, also change a different setting as well like contrast or brightness. if both settings revert after ten or 20 minutes, the television is still in shop mode.
Keep me posted!
Any help greatly received.
In the menus under''setup' there is an energy saving mode. Off, Low Medium, High, Auto.
When you change it to for example Low, the back light reduces etc, but in around 10 minutes it goes back to normal.
Does anyone else have this problem with samsung series 4?#