The DNIe demo mode would be on if the television was in Shop Mode. You can reset this by holding down the EXIT button on the menu for 15 seconds (while the television is on) and by clicking YES when prompted to RESET.
The clicking may be a hardware issue, and I would recommend having that symptom checked by a service tech.
i have a samsung TV A450 almost 1.5 years that TV showing amazing picture, in the last few days when i turn the TV on, before the screen turn on the TV making a crunch sound and the picture are disply with NDIe error with screen splet for two that show me how its look when i turn the NDIe on or off, i open the TV menu and put the NDIe Off, its happen to me every time that i turn the TV on.
yasterday when i turn my TV on the TV not turn on and insted making a click noise like the TV turn on and Off by here self.
you have any recommendation how i fix it?