Nintendo switch does not load in dock?

My switch no longer loads in the dock. When I put it in, the green light flashes briefly and goes off again. I already tried to plug the USB cable directly to the switch. I also waited 20 minutes. After that, she goes on briefly, shows the nintendo symbol and up in the corner she invites and goes out immediately.

What could be the reason?

Do you have any other tips?

Have you tried another socket or checked the charging cable? The switch has a USB 3 connection. Can it so first try with another cable. If that does not work you have to wsl. Replace the battery, because you have two years warranty.