Arduino UNO unable to connect via USB

Hi, @sterretje.
It seems you were right about this: the problem it's not in the 328P. So I'll try to reprogram the 16U2, but the link that you provided didn't work for me.

I guess that this tutorial could help: Arduino - Upgrading16U2Due. I would like some opinions about this approach though, mainly because the tutorial is oriented to the Duo and not the UNO.

Pablo :slight_smile: