Editing my post... Here is how to get to the menu. This worked on my 55" 6050 from Costco.
Note, you will loose all settings you have setup on the TV when you do this procedure. I take no responsibility for anything else you change in the settings within the service menu.
Turn your TV off.
On the factory remote press in rapid succession: Mute, 1, 8, 2, Power
Select Option, then Factory Reset.
Again, press in rapid succession: Mute, 1, 8, 2, Power
This time highlight "advanced" Press 0, 0, 0, 0... Not too fast.
Select Dynamic Dimming, and press left or right to change to off.
Turn your TV off
You are finished!
Edited by jetpuf - 3/23/13 at 10:39pm