Some things to check...
- Check: Config TX INH needs to be set to "false"
- Be sure that you are not in the test mode (TX is blinking) -- Press and Hold "Mode Up/test" to toggle
- Connect dummy load, and press & hold "XMIT/Tune" -- if this works, then the hardware is probably OK.
- If in CW, Press "XMIT" and try to send. If that works, then
- Be sure that the VOX is selected to enable QSK -- Press and hold "Band/Down" to toggle between VOX and PTT.. When selected, the VOX symbol will appear in the display.
Good luck with your new K3...
73, Ned, W2NED
K3 sn: 1072