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Hi
I used to be a bench engineer specialising in repairing Philips TV's.
Obviously, I'm speaking from past experience and not suggesting Samsung is the same but I'm reasonably confident your theories are not really in line with what really happens.
If you restore a Philips TV to the default values, they are without fail a complete mess.
The tolerances of the scan coil assemblies are very wide and each TV is indeed set up by hand (albeit not by a human!). On the production line (and I'm sure Samsung will be the same), a machine vision system is used to set the TV's up. A sequence of patterns is displayed on the screen and the display is monitored by a CCTV system which then automatically adjusts the settings on the TV. These settings are then stored and the TV moves off for final QC where small adjustments may be made by a human.
I'm sure there must be a way of displaying an alternative source whilst in the service menu. On Philips sets, this can be achieved by using the local buttons on the TV - have you tried that? Which source can you see by default?
Regards,
Steve
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