Welcome to the forum.
It sounds like you have the unit in shop mode. To fix this, you have to do one of these two things:
1. Hold down the menu button on the television (not the remote) for 10 seconds. The screen might flicker or display "Dymanic", and if that's the case, you're where you want to be. (If it says Shop Mode, then you've put it in shop mode). Shop Mode is toggled on and off this way.
2. Same as #1, but push the volume up button once, release, and then hold down the menu button for about 10 seconds.
Keep me posted!
Hello new to the boards looking for some quick help. I just bought this tv and am having trouble setting it up. It works fine on movies but when I play my ps3 on hdmi1 the settings change by themselves every 20-30 min. I put the setting to standard and change the brightness to what i want for the game. 20 minutes pass and the tv changes itself back to dynamic and drops all the settings back to where it they stand when the tv is reset? Is there a setting I have in a wrong position? thanks for any help ahead of time