It's likely that the television is in Shop Mode. The symptom would be that your settings are defaulted back to the out-of-box settings?
Try holding down the Menu button on the TV (Not remote) for 12 seconds.
Try pushing the volume button up once, let go, and then hold down the MENU button for about 12 seconds.
You might see the screen flicker, and that's okay. Once you've done that, you should be able to program your settings and they should stay.
Keep me posted.
I have a Samsung LCD TV , Model no - LA32R81BD
Any changes I make to the menu wont save anymore, especially ' Blue LED option'
Do this LCDS have an internal battery like a computer ?