Wow. DON’T go opening your TV, on this person’s ‘whim’... GEEZ![br]
There’s a LOT more they could have asked and looked into, before asking you to go above & beyond.[br]
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Googling the model & issue would have revealed (if they had bothered) that this is a common complaint with the 2017 models-on, and software/feature related (unless you actually have a defect)[br]
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Also, he could have asked is it constant or re-occuring(?)[br]
I also have the same frustration with the same model and why I came here.[br]
This happens EVERY evening, around 9pm, (During the day it’s normal again) [br]
Yes, I disabled power-saving and it only got a shade lighter.. so particularly infuriating.[br]
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Lastly, I’d ask have you tried other modes, such as launching a video game or app through PC/HDMI(?)[br]
When I launch a game, it becomes bright again and normal.. But the desktop is dim, just like TV mode.[br]
This is another BIG clue, it’s NOT a hardware issue..[br]
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Please drop the screwdriver & back away from the set!![br]
This person isn’t going to replace your set, if something goes wrong & I bet taking it apart won’t lead to anything.. (good that is)[br]
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-Best wishes, just keeping it real