Yeah, second what
@3lectr1cPPC said. I have found in my cases that when I see only a section of the screen like that (consecutive rows for part of the screen), it’s usually the ribbons on the side of the LCD panel that lifted off or got damaged and at that point it’s toast. I have found no good ways to fix it.
I had one panel that I successfully fixed vinegar syndrome on, no dust, it was perfect but while putting it together one of the ribbons lifted off and I lost about 20 pixel rows on the bottom and could never fix it.