I have a Toshiba L310 laptop and there are a horizontal lines across the bottom of the screen.     
They are not stuck at one color; if I fill the screen with white, they very slowly (about 15 seconds) turn from there previous color(s) to white.       
It's very strange, and I can't find anything about the problem ; it's not stuck/dead pixels.     
   
   
   
   
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