Picture Mode reverts always to Dynamic after several minutes

please follow this step:
you have customized the picture and menu settings on your Samsung TV only to find that they keep reverting back to their default positions, this is because your unit is in what is referred to as "Shop Mode." This is the demonstration mode used by electronic retailers to show potential buyers all the features a Samsung television supports. Press the "Info" button on your remote control, and if under the "Picture Mode" heading it reads "Shop Mode," hold down the "Menu" button on the TV itself until the screen reads "Dynamic Mode." This has changed the picture mode to one of the pre-set positions. You may now change any settings you'd like.
God bless you

This may help you...you can also get an owners manual free on line.


English - 23
Using Automatic Picture Settings
Your TV has Three automatic picture settings ("Dynamic", "Standard", "Movie") that are preset at the factory.
You can activate either Dynamic, Standard, Movie by making a selection from the menu.
1. Press the MENU button to display the menu.
Press the ENTER button, to select "Picture".
2. Press the ENTER button to select "Mode".
Press the ??² or ??¼ buttons to select the "Dynamic", "Standard", "Movie" picture
setting. Press the ENTER button.
?³ Choose Dynamic to increase the clarity and sharpness of the picture.
?³ Choose Standard for the standard factory settings.
?³ Choose Movie for a natural Image without picture enhancements.
3. Press the ??² or ??¼ buttons to select "Contrast", "Brightness", "Sharpness",
"Color", or "Tint(G/R)", then press the ENTER button.
4. Press the ??? or ??? buttons to decrease or increase the value of a particular item.
For example, if you select "Contrast", pressing the ??? button increases it.
Press the ENTER button.
Press the EXIT button to exit.
• When you make changes to Contrast, Brightness, Sharpness, Color, Tint(G/R)
the OSD will be adjusted accordingly.
• When in PC mode, Tint, Sharpness, and Color are not available.
Press the P.MODE button on the remote control repeatedly to select the desired
picture mode.
Picture Control
Move Enter Return
Mode : Dynamic ???
Contrast 1 00
Brightness 50
Sharpness 85
Color 55
Tint G 50 R 50
Balck light 1 00
??¼More
TV Picture
Move Enter Return
Mode : Dynamic
Contrast 1 00
Brightness 50
Sharpness 85
Color 55
Tint G 50 R 50
Balck light 1 0
??¼More
TV Picture
Dynamic
Standard
Movie
Move Enter Return
Mode : Dynamic ???
Contrast 1 00
Brightness 50
Sharpness 85
Color 55
Tint G 50 R 50
Balck light 1 0
??¼More
TV Picture
50
??² Con trast ??¼
Move Adjust Return
English - 24
Adjusting the Color Tone
You can change the color of the entire screen according to your preference.
1. Press the MENU button to display the menu.
Press the ENTER button to select "Picture".
2. Press the ??² or ??¼ button to select "Color Tone", then press the ENT ER button.
3. Press the ??² or ??¼ button to select "Cool2", "Cool1", "Normal", "Warm1",
or "Warm2".
Press the ENTER button.
When the picture mode is set to Dynamic or Standard, Warm1 and Warm2
cannot be selected. Movie mode is only available.
Move Enter Return
??²More
Color Tone : Cool2 ???
Detailed settings ???
Size : 16 : 9 ???
Digital NR : Low ???
Active Color : On ???
DNle : On ???
Reset : OK ???
TV Picture
Move Enter Return
??²More
Color Tone : Cool2
Detailed settings
Size : 16 : 9
Digital NR : Low
Active Color : On
DNle : On
Reset : OK
TV Picture
Cool2
Cool1
Normal
Warm1
Warm2
Activating Backlight
You can adjust the screen brightness by adjusting the LCD backlight brightness. (0~10)
1. Press the MENU button to display the menu.
Press the ENTER button to select "Picture".
2. Press the ??² or ??¼ button to select "Backlight", then press the ENTER button.
3. Press the ??? or ??? button to decrease or increase the valueof the backlight
brightness.
Press the ENTER button.
Press the EXIT button to exit.
Move Enter Return
Mode : Dynamic ???
Contrast 1 00
Brightness 50
Sharpness 85
Color 55
Tint G 50 R 50
Balcklight 1 0
??¼More
TV Picture
5
??² Balcklight
??¼
Move Adjust Return
Move Enter Return
??²More
Color Tone : Cool2
Detailed settings
Size : 16 : 9
Digital NR : Low
Active Color : On
DNle : Off
Reset : OK
TV Picture
OK
Cancel
Resetting the Picture Settings to the Factory Defaults
1. Press the ??² or ??¼ button to select "Reset", then press the ENTER button.
Press the ??² or ??¼ button to select "Cancel" or "OK" then press the ENTER button.
Press the EXIT button to exit.
Each mode can be reset.

hello there,

Your TV has three automatic picture settings ("Dynamic", "Standard", "Movie") that are
preset at the factory.
You can activate a Picture Setting by making a selection from the menu.
1 Press the MENU button to display the menu.
Press the ENTER button to select Picture.
2 Press the ENTER button to select Mode.
Press the ? or ? button to select the Dynamic, Standard, or Movie picture setting, then
press the ENTER button.
? Choose Dynamic for viewing the TV during the day or when there is bright light in the
room.
? Choose Standard for general TV watching mode.
? Choose Movie when watching movies.
Press the P.MODE button on the remote control to select one of the standard picture
settings.
3 Press the ? or ? button to select Contrast, Brightness, Sharpness, Color, or Tint,
then press the ENTER button.
4 Press the ? or ? button to decrease or increase the value of a particular item.
? You cannot adjust the Tint in DTV, Component or HDMI mode.
5 Press the ENTER button to return to Mode.
6 Press the ? or ? button to select Color Tone, then press the ENTER button.
7 Press the ? or ? button to select Cool2, Cool1, Normal, Warm1, or Warm2, then press
the ENTER button.
? When the picture mode is set to Dynamic or Standard, Warm1 and Warm2 cannot be
selected.
Resetting the Picture Settings to the Factory Defaults
8 Press the ? or ? button to select Reset, then press the ENTER button.
? Each picture mode can be reset.
Press the EXIT button to exit.

there ya go if you need anymore help let me know and don't forget to Rate

Go in the tv menu,right at bat u in the Picture mode go down the menu to reset push it.The Tuner board will reset it self.It will be set on the Dynantic fixed mode.And the AV mode button on the remote should able to changes back and fourth again Dynamic fix mode,Dynamic mode,Standard mode,User mode,Game mode.Not able to changes by pushing the remote button AV mode to changes,than ur Tuner board have problems,not working properly.

Most likely you are in "retail" mode which intentionally reverts back to "vivid" which is deemed best for store display purposes.

Go to pg 21 of the manual and follow the first half of the reset instructions. Once you've chosen "home" (after first selecting "langauge") you need not go any deeper into set-up mode, just exit at this point.

99.95% sure this will solve your problem and your "picture" selections will now stay put.

I have the same tv and i just fixed it! mine was a display model at wal mart so it was set to reset to Dynamix (fixed) after 30 minutes of no remote activity

THE FIX: switch to TV MODE and select the EZ SETUP from the option menu
when you get to the TV LOCATION option select HOME

The STORE option resets the TV after 30 mins of remote control inactivity in case someone messes up the picture settings in case someone playing with it while it was on display at the store

Your TV is in DEMO-STORE MODE.
Go to menu, find Plug & Play option, start it, and when asked, select Home Mode, than Enter and than just Exit.
:-)
Enjoy Your TV!

You need to change the option throgh the service mode.
You can not access that mode without permission from Samsung.
better to contact Samsung call center.

Your TV may have been put into shop mode or demo mode. How to get out of "Shop Mode"



1. Press [Source] to get to the Air or Cable input on the TV or TV remote


2. Press [Volume +] once on the TV itself (not the remote)
Next step must be completed while the volume bar is still on screen



3. Press and hold [Menu] on the TV itself (not the remote) for about 7 seconds
If the screen flashes "Dynamic Mode", the process worked



4. Finally check whether the Picture Mode is "Shop Mode" or not after passing "INFO" on Remote Control. If picture mode is still in “Shop Mode” try the alternative way below


Alternative Method



Press [Source] on TV remote to get to the AIR or CABLE input
Press [Menu]
Press [Down Arrow] to highlight SETUP and press [Enter]
Press [Enter] again on PLUG AND PLAY
Wait 10 seconds
Press [Enter] to select ENGLISH (or choose an alternative language
Press [Right Arrow] to highlight HOME and press [Enter]
Press [Menu] repeatedly until you see the message ENJOY YOUR WATCHING
Confirm you are out of shop mode by pressing [Info] on the TV remote

It sounds like your TV is in Shop Mode.
Shop mode is a set of picture parameters that have been optimized for a store showroom or display floor. Shop mode does not allow you save any picture settings such as brightness or contrast.
To get the TV out of Shop Mode press and hold the Menu button on the front panel for three seconds, the picture will blank momentarily then reappear with “Dynamic Mode” shown on the screen. At this point the picture parameters can be changed and saved.