[Elecraft] K3 - USB

[N2TK, Tony]

Hooked up my backup K3 so I could add a mod on the other K3. I can't connect
to USB anymore with the backup K3. 

Verified that USB is selected in Config > RS232 > USB.

Swapped the KIO3B Digital I/O board between the two rigs. I can't transfer
the problem.

The only thing plugged into both rigs is the Powerpole and USB cable. 

I am using the same USB cable to go between both rigs.  

In Win 10 >Device Manager > Universal serial bus controller, I see added
"Generic USB Hub" when I plug in the USB cable.

 

What could I be missing or check?

Tnx for any feedback

N2TK, Tony