I'm afraid that it looks very much like a broken substrate. The screen has a very thin glass layer under the plastic. If you put pressure on it, it easily fractures. It's not repairable - it needs a new screen which will probably cost about two thirds the cost of a new machine - and it's not covered under warranty because it's caused by an impact to the Gen3 or pressure on the screen.
Sorry to be the bearer of bad tidings
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