[Yaesu] ft-920 - no output from any mode any band.

[shooter2]

I have owned this radio for 6 years with out a hiccup.  While working 
the CQ  WPX  on 20m ssb , swr 1.2:1 , my FT-920  display started 
flashing "ERROR" while keyed with no output.  I cycled the power switch  
and all functions seem OK with the exception of no power output. I have 
switched antennas and tried my dummy load with no success.
Nether the operating manual nor the technical supplement give any 
malfunction/ trouble shooting information of/ for protective circuit or PA .
Any help on or off the board is solicited.  k5kddatarrldotnet.
Thank you,
Jack
K5KDD