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#11
Late last night I also came to that same inclusion ... I mean conclusion. It's because a month or so ago I managed to whack something (maybe my pointed finger or a stick, don't remember now) hard straight into the screen. It seemed like it got momentarily pushed in like a trampoline. Horrified at how hard I'd struck it, I felt the surface and it was all flat and smooth and not depressed at the contact point.
So now -- "Surprise, Surprise" [G. Pyle] -- these lines started as only a few dots or dashes centered pretty much near where the screen had been hit! I now assume that two rips (starting as minor dings) in one of the layers have been slowly expanding: the other day I managed to tear an old bathing suit with very worn thin old cloth .... and the tear, which kept growing .... is more than a little similar to these expanding black lines in the screen and NOT in the computer per se.
It's been very hot here, so we cooled the laptop with a fan, with another fan blowing past a wet towel acting like a refrigerator (or moist leaves in tree) also lower room temperature (it works). So the tear has likely been encouraged to grow also by this repeated heating & cooling. No other lines have appeared so I will for now assume the damage is limited and there will likely not be more horizontal lines other than these horizontally expanding ones (much less so now as the weather has greatly cooled).
I will nonetheless leave the question "unsolved" in case some wizard comes up with something so far not considered. But that should still not involve "destructive testing" like running it all night! I want this only as a emergency backup and consider its remaining useful lifetime to be limited.
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