Hi I've just bought a Samsung LE40N7BDX and the dynamic dimming is a pain. I went to the service menu and option 2 to turn it off and Dynamic Dimming is greyed out of the menu. There are two lines in the menu showing ---- On which are greyed out, 2 HDMI is also greyed out everything in between High Deviation and Tuner Top are greyed out, Auto Power, Magazine LNA and Dynamic Contrast are also greyed out. I cannot choose any of the above from the menu as only purple menu items are highlighted as I scroll through. Any ideas of how I turn off Dynamic Dimming because I can't even highlight it in the menu.