[Elecraft] KIO3B usb com port not communicating

[Don Wilhelm]

Raj,

Try looking in Device Manager again.  Which COM port goes away when you 
unplug the USB cable from the computer?  COM1 is normally reserved for 
the motherboard serial port - which will be RS-232 and not USB.  It will 
be there whether it is connected to the back panel or not.

Then plug the USB cable back in - which COM port is assigned?  Put that 
COM port number into K3 Utility and try to connect.

73,
Don W3FPR

On 7/18/2019 10:03 AM, Rajiv Dewan wrote:
> Hello,
> 
>    I have KIO3B (USB interface) in my K3.  It was working well. Single 
> USB for audio, and CAT.
> 
> Suddenly, now the CAT part is not working.  Here are some aspects:
> * RS232 in K3/Config shows USB
> * Serial port 1 shows up in device manager on the windows computer when 
> the USB is plugged in.  The sound codecs are working.
> * Nothing communicates with the K3 CAT any more (K3 utility, and logging 
> programs do not see the K3 on the com1.)
> * I tried it on a new laptop with a fresh USB cable.  Exactly the same 
> issue.