Yes it’s the jumper. It’s labeled on the board as J14 or Auto Reset. Here is a picture to help as well.

https://lh3.googleusercontent.com/-d8Cv43NbUsw/VcpOxBd92ZI/AAAAAAAAAfs/iVSe5m-Wn0A/s1600/Melzi-ardentissimo-top.png

Was really hesitant to open up the i3, but I bit the bullet and she’s working away. Many thanks.

Hi Scott,
I still cannot get my printer to connect to my computer on Windows 10. Did you find the answer?

Steve I seem to be having the same problem. I cant even find my printer in the device menu let alone find the Baud rate.