Samsung UE40H6400AW TV (2015 Model) - Dust or Backlight Issue Causing Watermarks at Top

Hi

I have a Samsung UE40H6400AW TV.
Bought in January 2015. He has already been repaired once (March 2016) due to the warranty due to dust (then, apart from stains on the sides, one appeared almost in the center of the screen).

Currently, I can see the "watermarks" forming at the top of the screen again. Can you look at the photos and judge if it is dust or the backlight looks like this?

I'm starting to be interested in the subject, because in 3 weeks my warranty / guarantee expires.


What do you think about it? Is it dust from the inside of the matrix or just backlight?

I would like to add that the streaks at the top are most visible - especially on a light background, when moving the image horizontally (such as the view in the movie with the camera shift left / right).

The service will say it's dust or will it fall on the backlight?

rafmik wrote:

The service will say it's dust or will it fall on the backlight?

It does not matter - you contact the seller with the information that you withdraw from such a contract (because the tv has already been repaired and is still the same - and this is a significant defect).
Since it's the same, now YOU decide what to do with it.
You can repair, demand a price reduction, or withdraw from this contract completely.

KOCUREK1970 wrote:

It does not matter - you contact the seller with the information that you withdraw from such a contract (because the tv has already been repaired and is still the same - and this is a significant defect).
Since it's the same, now YOU decide what to do with it.
You can repair, demand a price reduction, or withdraw from this contract completely.

Here I will definitely try to withdraw from the contract (probably it will not be easy) :(

The only question is is it dust or something with backlight? Because I'm already looking at this TV and I don't know.
Today I looked at my parents' TV (also Samsung, version "c" from 5-6 years ago), the screen is much cleaner.

Ok - it turned out to be a leaky matrix, dust + some air pollution. The service confirmed the defect for the second time, the TV was returned to the store under the warranty (second repair, significant defect, withdrawal from the contract).