First get some screen cleaner, spray a micro cloth and wipe down your screen and the rest of your system with the cloth (don’t spray the screen or system directly) As you’ll need to visit an Apple Store or Apple authorized service center to get your system repaired under warranty or if you got the AppleCare+ service contract. Hopefully its still covered!
This appears to be a bad T-CON board, hopefully you didn’t have a liquid spill or damaged the display assembly its self.
Here’s the breakdown:
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