[Elecraft] K3 ERR TxG

[Jeff Wandling W7BRS]

Just tuning up a new amplifier, less than 10W.  Previous to this 
(minutes) running fine barefoot.

Have K3/100/KAT3

Symptoms:  During auto-tune, instead of showing SWR it shows "--", and 0.0 
W output in VFO B.

Also, after holding TUNE, the VFO B reads "ERR TxG"

Focusing on the K3, the manual says to contact Elecraft about ERR TxG, 
which I have done.  But in the mean time, what else can I try?  The manual 
says not to adjust anything.. I'm sort of stuck..  If this has happened to 
you, what did you do for resolving the problem?

Thanks,

-jeff