A couple of months ago, I had my Samsung UN46EH6030 LED-LCD serviced for a picture problem and the main board was replaced. I noticed that this required me to redo my calibration entirely (especially with regards to white balance/grayscale). I also noticed my N/D modes were reset (which usually can only be reset by selecting those modes in the user menu and doing the 'picture reset'... unlike the other pic modes that are reset whenever the TV is (factory reset) or when the SM is accessed). I know the TV has various major parts such as the panel/t-con, power board, and of course, the main board.
My question is whether the entire service menu resides somewhere on the main board alone or if it's not localized to a single part and rather parts of it exist/are stored on the various major components in the TV?
Can someone with experience in this subject explain how this all works? As in exactly where the firmware/service menu data & settings reside in the TV with respect to the major components (panel, t-con, main board, power board, etc.)?