Why are there vertical lines on when switched on my samsung qled?

Samsung QN65Q7FAMFXZA

When ever the device is switched on. There are vertical running lines on the display for a good 15 min. Any idea, what could be the issue?

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Lazy Guy let's see what those look like. Add pictures to your question Ajout d'images à une question existante

Do those lines disappear after 15min?

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