What happened to my 13" MBA screen?

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i took video of booting here on screen failure. appears have shifted top 1/3 of screen or bottom, top 2/3s permanent glitch, , bottom 1/3, when gets log in icons in osx, still reverts apple symbol seen during boot. sort of jumps , forth between current , old image.

i'm hoping diagnose if it's screen failure, logic board failure, video ram failure, loose cable, etc. can price out self repair options , decide do. have looked @ many photos , stories of screen failures , solves, have not managed locate failure looks one. can't find similar.

know isn't os because problem exists before os has booted. have cleared parameter ram.

laptop has been on shelf month - put away working, came out this. no drops or impacts, in case.

banging on/twisting laptop not change display in way, don't think it's simple loose or grungy connection.

https://www.youtube.com/watch?v=k84-njvbcec

ideas appreciated on part of system cause this.
 

seems gpu thats failing still have kind of warranty left?
 


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