The screen shows a set of lighter stripes, vertically (top-bottom), in various widths. For example, if i choose a green regular color for the Finder, then the screen is marred by a certain number of vertical bars (lighter green in this case) as if a painter had done these.

Is it the screen, or the lightning of the screen (fluo lamp?)

The problem appeared about 15 months of normal use… out of warranty!

Bertrand Morin