Vma 404 - is the board fried?

I recently bought the vma404 module, DC-DC ADJUSTABLE VOLTAGE STEP DOWN MODULE LM2596S

The device fulfilled its purpose flawless - up to the last weekend, it stopped working at all.

The output voltage equals the input voltage, regardless how many revolution the little screw does.

Did I fry the board accidentally?

Is there a description for the circuit?

Thanks for your reply.

And this forum needs a search function!

Sorry to hear that.
It looks like your board is friend.
As for the search function, it’s in the top right