Sorry if this is the wrong place. I have an LCD TV that got a strange single few inch line of light burn in randomly a few years ago. The thing is, the burn in has…migrated? It’s like a good foot and a half lower than where it originally burned in. And it’s changed angle. There’s a small darker spot where it used to be, even. What’s going on? If I give my tv another 10 years will the burn in migrate off screen like it seems to be doing?
Flooded screen with white, looks like this. Top darker spot is where it was at first. 
It’s definitely not burn-in, it’s likely some kind of defect in the backlighting system. For most LCDs the “backlight” is essentially a big thin white/mirrored panel reflecting or diffusing light in a very carefully consistent way from a very bright light source, typically either a fluorescent tube at the bottom or more commonly nowadays evenly spaced strips of LEDs. Some higher end models use more elaborate designs but they’re the minority. Defects in the backlight panel, the back of the LCD panel, or stuff like dust or even insects getting inside that reflective/diffuser chamber will affect the consistency of the backlight as it both blocks a bit of the light from reaching some places and reflects it to other places it shouldn’t be. That’s what it looks like is happening here. It could be some kind of delamination of some of the surfaces inside the TV, or it could be some puff of dust that somehow got inside, or even something like a spider decided that was a great place for a cobweb. Without opening the panel it’s hard to say what’s going on exactly, it might just need a very delicate cleaning or it might need replacement parts.
If you’re afraid of spiders, I’m sorry, you just have to burn the house down now, it’s the only way to be sure.
Fucking hate spiders lol. But I am very interested in all the info, thank you! I think I had it for a couple years maybe before this popped up? Actually I think it MAY have been a Black Friday deal so the fact that this is the only problem I have years later is probably lucky.
Yeah there’s usually some led strips and a thin white plastic sheet to help reflect and even out the light; the one inside a friend of mine’s TV got yellowish and brittle (because old and cheap) and drooped inside, resulting in weird shadows and spots.
That is an interesting one. LCDs as far as I know do not usually burn in and if it is moving then it is not really that anyway.
I will interested what others come up with?
Edit: Is sharp or gradual. Might be warping of films in the backlight for example if not sharp. Just a thought.
Yeah it’s been bugging me for a while but the fact that it’s moving has left me baffled.
See the edit to my comment. If not sharp, could be warping of films in backlight.
Initial burn in was sharp. Looked like someone took a knife to the screen in one spot essentially. But now it’s migrated down the initial spot is just slightly darker than the surroundings, and the burn in is now at a 75⁰ angle as opposed to a flat 90.
Edit I should add it’s not very noticable unless the screen is flooded with white, extremely noticeable, or you know that it’s there.
Sounds to me like the backlight behind the LCD. They have components which could potentially sag, stick, or warp. White screen is probably best way to see. Also look at various angles. May be more visible at some angles then others.
Hard to unsee. I know this feeling. I used to work in the industry years ago. Displays are never perfect and hard to unsee things once you see them especially when it was part of your job.
I mean I’ve gotten used to it by now, it’s less of a bother and more of a mystery lol. I just uploaded a picture of it, if that might help?
Backlight I think. Probably film pack warp / buckle / wetout. Just a guess.
Edit: Worst part looks kind of like a wrinkle.
That shit can MOVE though?
They could be pressure marks. Maybe you or someone else bumped the TV screen with some object?
Nah. Been very careful with that. And unless Freddy Krueger was gently caressing my screen that wouldn’t fit. Hold on I’ll see if I can grab a picture
Potentially it could also be something behind the screen. That could even explain the spot moving if there’s some sort of loose component inside the TV that has moved around over time. Pure speculation though.
