[Elecraft] PBT Knob Not Responsive

[David Rosenfeld (home)]

Hello, List.

The pass band tuning knob on my KX3 has stopped responding to rotation for
no apparent reason, and performing a hard reset hasn't fixed the problem.
There isn't any evidence of physical damage, and the unit hasn't suffered
any trauma of which I am aware.  Does anyone have a suggestion as to what
may be causing this problem other than the obvious possibility of a hardware
defect?  Thank you in advance for any assistance that you are able to give.

73s, 

David VE3BAK