I don't recall the exact menu but almost all models can turn that led off and if the set works, I'd let it be that way.
Bob
Hi, I have owned a Samsung UN55D8000 for several years now and absolutely love it, great
Picture, good capabilities and never a problem until earlier today. I was watching TV today and all of a sudden out of the blue the light up logo under the screen flickered a little and got dimmer. I walked over to the TV and tapped on the logo and it got bright again, but then went dim. I have went into the main menu to the light effects portion and turned it off then back on and it has done a variety of things from getting bright or being dim. Sometimes you can watch the logo bounce between light and dim. Any ideas?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic