[Elecraft] Lost serial communication with K3

[Jan]

A while ago I discovered that I had lost serial communication with my 
K3.  This was followed by other problems, which I am now resolving.  
However, I know that the serial problem appears to be in the K2, since I 
cannot communicate with it using the K3 utility.  I tried the K3 utility 
on two different computers, and it does not speak to the K3.  The light 
on the serial-USB converter blinks, and Logger32 shows that the computer 
and program are trying to speak to the K3, but there is no response.

I would like a suggestion about the next step in the troubleshooting 
process.  I know that a factory reboot requires a lot of fussing 
afterward, but if this is a logical step, then I will take it.

73,

Jan, KX2A