[Elecraft] K2 Serial port problems

[Jim Purvis]

Thanks to all that responded.
  Peter, AC7SB, was a great help.  As it turns out the CW sidetone source was selected to U6-25.  That is where the data has to come from. Moving it back to U8-4 in the ST L menu did the trick.  Now my only mystery is when/how/why did it change from default in the first place??
  But all is well again.  Thanks to all for the help.
   
  Jim
  wa7hrg