[Elecraft] PX3 / KX3 USB Problem

[James Bennett]

Have a KX3 and PX3 that have been working fine - until this morning. Today I am unable to have the KX3 connect to my computer if the PX3 is powered on. If I turn off the PX3, the KX3 serial - USB connections works fine. As soon as the PX3 is powered on, the connection goes away. I'm using Elecraft-supplied cables, not off-brands. The PX3 Utility cannot connect to the PX3 with the KX3 on or with it off. Other than the connection to my iMac being hosed, the PX3 and KX3 appear to be working just fine.

Any suggestions how to determine what's going on?

Tnx, Jim / W6JHB