Stripe on laptop monitor, what could be the problem?

Question

Monitors

A couple of days ago, while working on the laptop screen, a strip of a couple of green pixels first appeared in the middle of the screen, and after 5 minutes the entire lower part of the strip turned pink, while what was happening on the screen was visible behind this pink.
I immediately connected a separate monitor to the laptop via vga / hdmi and everything is perfect on it. I concluded that everything is fine with the video card, then the problem is either in the matrix or in the cable (I already changed it about 3 years ago). I rebooted the laptop, and even during the BIOS boot, the bottom of the screen remained pink.
I turned off the laptop, waited 5 minutes, turned on the screen everything is fine, I start working, after 7 minutes the bottom part turned pink again. As a result, it was noticed that the longer the laptop is turned off, the later, after turning it on, the lower part of the screen becomes pink.
I thought that is why artifacts are heated. On the trail. took it apart for a day, cleaned everything, replaced the thermal paste, checked whether the cable was connected well, worked for 2 days and again the same thing. Now I work for 10 minutes, then the laptop rests for 5 minutes ...
Who knows what it could be? Somewhere they write that the plume, somewhere the matrix, and somewhere something with backlight ...
Here is a video (the video shows that when I open the white background, the pinkness goes away, which is strange) https://youtu.be/EvFNvFb0dfM

Answer 1

It was like this - decoders fly on the matrix.
It is treated by replacing the matrix.