[Elecraft] My K2 is finished up to testing stage but no Transmit - receives fine all bands ideas?

[Clifford Hynds]

Well I finished the K2 only to find no TX preliminary troubleshooting seems
to suggest the T/R switch D6 and D7 are not getting the control signal from
the control board, Also U9 shows higher voltages ,

Is there anything common that may be wrong, All bands peak fine on receive.

thanks for any ideas. I followed the troubleshooting in the manual and
there is no RF right from the TX mixer buffer stages which suggests it is
not being switched into TX mode.

thanks
73
Cliff VK2CCJ