[Elecraft] Stumped: K2/100 stopped going into Transmit for digital

[Carter Craigie]

Hello fellow Elecrafters,
I am completely stumped!
I have been using my K2/100 along with a SignaLink USB soundcard to do
digital programs, such as PSK31, RTTY, and FT8--all with no problems, for
years.
After downloading and installing the latest version of Ham Radio Deluxe I
now have NO ability to transmit.
I have tried going back and trying Digipan, but no joy there, nor with FT8.
I have no idea what went wrong, and I really don't think my problem has
anything to do with downloading and installing the new version of HRD.
I have taken my control cable (which runs from the K2 to its tuner to its
FTDI USB-232 converter) and have used my Volt-Ohm meter to trace continuity
in all the wiring, and everything ohmed out just as I had built the cable
years ago.
I know that the SignaLink USB has the correct setup, as I have been using
the chip for the K2 which has faithfully worked for me.
I have checked the Com Port (in this case, COM3) and made sure that I have
all the parameters correct.
I have disconnected all three cables going into the SignaLink USB and
reconnected them several times, as well as having done the same on the K2.
Nothing seems worn or improperly used.
BUT:
NO red transmit LED on the SignaLink USB, nor any transmitting bars show on
the K2. No Problems with the receive. And the K2 responds to commands from
the computer, such as changing frequencies and such.
I am completely stumped. Any ideas for me, please?
73,
Carter Craigie, N3AO
Blacksburg, VA
(540)250-8184
carterwc128 at gmail.com
Elecraft K2/100 Nr. 678