My dell inspiron 7559 is showing brown smudges at the border of the screen. When i put the laptop in a different angle the smudges slowly start to migrate towards the lowest point of the screen according to gravity. When I say slowly I'm talking about hours. I updated my video drivers to no avail. These brown smudges look like a light brownish shade.
Run the laptop LCD BIST (Built-In Self Test) Diagnostics. Post pictures or video of the results.