flatbield

Yes humans are terible at multitasking.

Not at all. The Volt is great. No major issues. Not sure why your loosing your shit over something you seem to know nothing about.

Over bloan. Software does not age but security does. Other things that do not age well is specialty tech hardware components. Batteries are a question too.

I know my volt at 10 years does not have a viable oem battery replacement (back ordered and nutty price). I can get a reasonable after market battery though.

Yes good analogy. Just my guess. Been a long time since I actually worked in the field.

There are various designs of backlights. They typically have a stack of loose components in an assembly. By loose I mean not totally fixed but not too free. They have to free float enought that temperature changes do not cause issues. They also have to not stick, warp, or buckle over time. Harder to engineer then you might think.

So consider what might happen if for example the top backlight film might buckle some then stick to the back of the lcd. The film might deform which would change its optical properties. Then later thermal cycling might cause release. It might do same elsewhere.

Not saying this is mechanism, but just example.

Edit: Keep in mind the LCD is glass, and the backlight components are plastic. Very different thermal expansion coefficients. Then add LED or CCFL lighting and you have a big changing heat source. Add on top of that humidity changes too.

Backlight I think. Probably film pack warp / buckle / wetout. Just a guess.

Edit: Worst part looks kind of like a wrinkle.

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.

See the edit to my comment. If not sharp, could be warping of films in backlight.

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.