[Elecraft] K3 shutdown

[John/K8AZT]

My K3 sn1693 has just started exhibiting a troubling problem.  Operation in CW 
when I put key down, the rig shuts off completely.  When turning back on, it 
forgets frequency that was set just prior to shut down.  I thought this might be 
rf in shack, so tried with dummy load and same problem.

Any suggestions or has anyone else experienced this behavior?

73,
John/K8AZT