I did not know that Samsung (latest samsung product of my life) forzed firmware upgrade (2770) even though I had turned off.
I did not know that it was possible to turn off in the menu service.
After the forced upgrade the quality of my H6240 (600?....) is no longer what it was before.
After update, bad quality in SD channels, all very blurry, seem to 576p, as if suddenly I lost two tenths of myopia... Faces with dominant green (!!) I corrected it by decreasing G-Gain -6 and increasing the B-Gain +12, but the faces are also in HD channels very "burned", people a little tanned seem brown "afro".
When I approach it, I noticed that even in HD, but especially in SD is as if it changed the whole upscaling, now much noise so far as you do not have the right sharpness, but as soapopera seem blurry!
All this had not happened before.
I know that it's no possible downgrade it, I ask you if I can "to compensate" somehow these problems.
Also if these updates from elementary school are tailored to damage the TV and invite people to purchase other TV ... otherwise there is a real reason.
The "developers" are aware of all these disasters? If you know it, they're going to fix it?
Google is FULL of this request...

Thanks