If you take laptop to a dark corner (no reflection from anywhere) and shine a flashlight across the surface (i.e. the beam starting at one edge of the display and ending at the other), can you see any image however faint?
I can't tell from the photo if the patterns on the screen are appearing on-screen, or are reflections from an external light source. A bad inverter results in a backlight that won't light up so the screen looks black. If the pattern in the photo is actually displayed by the monitor, then I would say that either the logic board on the panel is bad, or the on-board video. If you hook up an external monitor and the display is OK, you've eliminated the video chip as the source of the problem.
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