This post is more a "what's going on here" thing than anything else but here goes.
The above Panny 1080P LED back-lit TV is about eight years old now. About three years ago the dark blotch that can be seen in the lower middle of the image appeared, and it has now been joined by its brother to the lower left. I was able to get used to the first blotch but this second one is annoying.
Both appeared in a similar way. They started off only being dark when the set was first switched on from cold. They'd start off dark, then flicker dark and bright for a while before finally disappearing and staying bright.
If the set was set to low back light setting (30%), they'd be more prone to staying dark for longer. At full back light they'd go bright.
This state only lasted a few weeks before they became permanently dark.
My first thought was dead LEDs but surely these are series-string so if one goes (and certainly two, with one being dark for years) they all go?
Or is this something else - warping of one of the layers inside maybe? The flickering goes against that theory though.
Just curious as to what the failure is here and ultimately if it's going to result in eventual total panel failure.
Any views gratefully received. Ignore the dark horizontal band BTW, that's a camera/PWM artefact in the image.
The above Panny 1080P LED back-lit TV is about eight years old now. About three years ago the dark blotch that can be seen in the lower middle of the image appeared, and it has now been joined by its brother to the lower left. I was able to get used to the first blotch but this second one is annoying.
Both appeared in a similar way. They started off only being dark when the set was first switched on from cold. They'd start off dark, then flicker dark and bright for a while before finally disappearing and staying bright.
If the set was set to low back light setting (30%), they'd be more prone to staying dark for longer. At full back light they'd go bright.
This state only lasted a few weeks before they became permanently dark.
My first thought was dead LEDs but surely these are series-string so if one goes (and certainly two, with one being dark for years) they all go?
Or is this something else - warping of one of the layers inside maybe? The flickering goes against that theory though.
Just curious as to what the failure is here and ultimately if it's going to result in eventual total panel failure.
Any views gratefully received. Ignore the dark horizontal band BTW, that's a camera/PWM artefact in the image.
Attached Files
Never done it before so hope I don't bust the screen in the process.
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