49 XF9005 Horizontal lines

[Thodoris74]

I've recently bought a 49 inch XF9005 and I've noticed faint horizontal lines extending to both edges of the screen whenever there are white or bright menu lines on single colored backgrounds (like on PS4 setting screens or PC windows). These lines are only horizontal, never vertical or diagonal and are of the same thickness as the original menu line, only much fainter. They also move should the menu's position change and can appear anywhere on the panel. (I've tried different hdmi cables, different inputs, even jpgs on USB sticks)

I've attached a photo that I've photoshoped to showcase the problem. 

[Pascale_F]

Hi Thodoris74,

Welcome to the community.

I'll see if I can find this out for you. Maybe someone else in the community can help in the meantime.

Thanks,

Pascale

[The_Black_Rose]

Hi Thodoris74 ,

Does this happen when you have no external devices connected as well?

Cheers,

The_Black_Rose

[Thodoris74]

It does. With no external devices connected, I can still see (for example in the TVs help menu) faint lines extending from the search bar to the edges of the screen. 

[The_Black_Rose]

Hi,

I've found this link: http://bit.ly/2F7FrNW on the Sony website mentioning lines and bars and picture issues, could you try the steps in it and let us know how it goes?

Cheers,

The_Black_Rose

[Thodoris74]

Thank you Black Rose. I've already searched the page you've refered me to, but haven't found anything useful. It's as if whenever there is a line (or more) of bright pixels, the TV is compensating by lowering the brightness of the rest of the pixels on the same horizontal plane. Why it does this only horizontaly and not for the pixels that are vertical or all around is beyond me. Of course I'm just guessing here and it could be something completely different.

Of course I've tried turning off all enhancements such as contrast enhancer or local dimming.

[royabrown2]

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@Thodoris74 wrote:

Thank you Black Rose. I've already searched the page you've refered me to, but haven't found anything useful. It's as if whenever there is a line (or more) of bright pixels, the TV is compensating by lowering the brightness of the rest of the pixels on the same horizontal plane. Why it does this only horizontaly and not for the pixels that are vertical or all around is beyond me. Of course I'm just guessing here and it could be something completely different.

Of course I've tried turning off all enhancements such as contrast enhancer or local dimming.

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Surely it’s increasing the brightness of the rest of the line? Or using a lighter blue than on other lines, anyway.

And what happens at the right hand side (not in your picture)? After the white stops, is it light blue again, or is that side OK?

I think I recall that we used to see this ‘pre-echo’ effect on Trinitron CRT sets, in which case I might predict that the right hand end of these lines will be OK. Though OTOH, I would have thought that LED processing would be a world apart from CRT processing.

[Thodoris74]

I think you're right royabrown2. it's probably INCREASING the brightess (I only considered it relatively the white line it extends from) but relative to the surrounding pixels it probably increases the brightness. However it extends to the right side of the screen as well, not just to the left portion I've cropped in the photo. It's baffling. 

[Win_88]

Hi there,

I'd try going back to basics:

1. Make sure the TV is up to date: https://www.sony.co.uk/electronics/support/lcd-tvs-android-xf90xx_x90xxf-series/kd-49xf9005/download... (keep in mind the notice posted on the About section)
2. Try resetting the TV to factory settings: https://www.sony.co.uk/electronics/support/televisions-projectors-lcd-tvs-android-/kd-49xf9005/artic...

Win_88

[hitta_jonte]

Happend on my LG tv, i got this answer from RTINGS. Anyway i got a third line (the first one on picture) and i got my replaced with a Sony tv and i dont see the lines now.