Hi,

no these tv do not have 2way comunication, about the stand,  stby,audio,video is fixed but you can have six more in stand settings meny on tv 

Thanks

How do I set a default position for the stand when i turn it on?

Ouch, that backlight bleed is the horror! This can not be normal right?

Those white strips in your first image are maybe even worse.

I don’t think the white lines are a problem; this is probably just the source. It’s difficult to comment on light bleed too as we don’t know what you were viewing (or supposed to be viewing) with the screenshot you took. The second picture looks fine and normal, at least to my eyes.

More info is needed. Light bleed is common on these TVs as they are edge lit so light bleed would usually show up more along the sides than the middle, the latter of which is just part and parcel of owning an LCD television, which is not a perfected technology. This is where OLED comes into its own as each pixel is individually lit.

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Thank you for your answer :)

I'm not complaining about the white lines, but instead the massive backlight bleeding at bottom center at the display. The color should be uniform at the bottom center part of the screen on both pictures but it is not. The backlight bleed gets even worse when we watch a dark movie, because of this huge grey blop at the middle of the screen.

I do have another 75" LCD tv set at home, and it doesn’t have this backbleed at the middle of the screen at all when using the same source : Apple TV 4K. It does have minor backlight bleedings a few small places, but that is what to expect of an edge lid panel I've been told.