Nintendo power lamp is not working?

And although I have the problem since today that the power lamp of my Nintendo 2DS no longer works, but otherwise everything works you can rule out that the Nintendo is broken.

Now I ask for your help and ask you what you think that might be or how I can fix it.

As a layman, you can't fix anything there. It is simply the lamp broken main thing the Nintendo works. A repair would not be worth it either.