[Elecraft] K3 DATA A Mode not working

[Bill Wiehe]

I recently downloaded a JT65 program and after several days of flawless operation, my K3 stopped transmitting in DATA A mode. The K3 keys but nothing is transmitted and no power out. I changed over to BPSK31 via HRD  using DATA A with the same results. All the other modes (RTTY FSK, CW, SSB) work fine with no issues. Only DATA A seems impacted. I reloaded the Firmware from the website and went through the Configuration tables and that all that appears correct.I must have missed something  someplace so any help would be appreciated.Thanks, Bill-W0BBI