[Elecraft] k2 main tuning locked up

[Jim Allen]

I had this happen the other day.  Turning the main tuning knob did not
change the frequency.  I microsofted it (turned it off and rebooted) and it
was restored to proper operation that time.

Now, it is frozen once more and that has not fixed the problem.

The only thing I could find in the documentation dealt with locking the
VFO, and unlocking.  I have verified that it is "nor."

What next?

TIA

73 de W6OGC  Jim Allen