Cell phone (S7) broken at once! Black screen?

I had previously charged my cell phone (Samsung Galaxy S7) for about 1-2 hours and did not touch it in time. But now I took it off the charger and found that the screen no longer comes on. But the little light above lights up because I probably received a message. I've already googled what you could do, but no key combination helps and if I connect it to the laptop with a cable, it won't be recognized.
Maybe someone knows what happened there and what else I can do?

If necessary, connect it to the power supply again and see if the charging sympol comes.

At worst, do a hard reset

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