[Elecraft] Help - K3/100 no power over 12w

[Reed Bumgarner]

Prior to running WSPR on 10 meters at 5 watts for about 30 minutes
yesterday the radio was functioning properly putting around 30 watts into a
KPA500. Now today nothing above 12. I've tried the parameter
initialization, power calibration, and even reloading the firmware but no
joy. Is there anything else I could try or should I ship it to Elecraft?
Thanks, Reed AA1RB