I'm sorry for not perfect english. In time I'll do a good quality translate. If you could not get anything please feel free to contact me in comments. I will answer you as soon as possible.
On a folding TV (also known as DVD-player and much more), the image has lost its former color saturation and could be lost.
So it looks like:
The effect is started when moving the lid. And you can find a position in which the image quality is not lost, but over time it became worse.
The changes look like this:
Very similar to the bending plume. Let us examine and see.
Remove the lid top.
Then the bottom.