Your set is likely in SHOP mode. You can turn this off by doing one of the following:
1. On the TV's bezel, hold down the MENU button for 12 seconds until you see "Home Mode" or "Dynamic".
2. On the TV's bezel, push the volume button up, release, and then hold down the MENU button for 12 seconds until you see the screen flash "Home Mode" or "Standard"
3. If neither of those work, you can reset the television by holding down the EXIT button on the remote for 15 seconds, and then clicking YES when prompted to RESET.
I have a 2009 LN40B640 and all of a sudden its settings are resetting to the defaults every time I turn the TV off. I've even seen it reset the settings while watching the TV...
Does anyone know of a setting that is causing this? It's almost like it's in demo mode
The full TV model is LN 40B640R3FXZA, SS02
Any help would be greatly appreaciated!