[Elecraft] Test serial-to-USB converter

[Jan Ditzian]

I have a K3 that lost communication with my computer.  It uses an 
Elecraft serial-to-USB converter and cable.  This probably happened 
during a known power surge.  I also lost communication to my MDS rotor, 
which uses a built-in USB cable, which I believe may also be a 
serial-to-USB arrangement.  I checked things out a bit, and I can tell 
that my USB ports all seem to work.  I also tried the K3 with another 
computer and was unable to communicate with it.  However, I also tried a 
direct serial-to-serial cable from the K3 to the first computer, which 
has a serial port, and was also unable to communicate.  I am now unsure 
of the location of the problem.  I am willing to go with whatever works.

Is there a way for me to test the serial-to-USB converter and cable by 
itself, or otherwise determine whether it is working?

73,
Jan, KX2A