Why don't you just use the picture wizard to set your own expert setting? The standard seems to be the best IMO.
Also I was getting the same greying out or dimming. It was the the damn energy saving mode. If its set to max it dims out, I haven't looked into why so I put just but mine at minimal as I don't need it doing so while I'm watching TV.
Any help with the picture settings for my new 47LS4500 would be greatly appreciated.
Also: Film mode worked when I used my XBOX for Netflix and games. It's been a week and now it's greyed out whenever I try to toy with the picture settings. I reset everything and it's still greyed out on OFF. Anyone know why?