About 3mm thick black border top, bottom and right what to do?

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I suddenly noticed yesterday that my laptop top, bottom and right shows a black border on (about 3mm thick). Looking at the video, then sometimes a white margin appears on the right side. I have a Nvidia GTX 1650 and Windows 10th I've already tried the resolution back and forth and have synonymous already in the control center on full screen.

Gr

And before?

Could theoretically also be a beginning display error, Google times after the model with this question "Display Rand", if there's perhaps another user with a similar problem.

Gr

There should be something here…

https://praxistipps.chip.de/...-tun_35907