[Elecraft] No audio from speaker on K2

[Kennet4723 at aol.com]

Ok---this might be elementary to many but I can't seem to find the problem.  
After I built the NB board and plugged it in along with the SSB board and 
plugged  in  the ATU cable and  the internal battery cable, I plugged in the 
speaker cable, Now there is no audio from the speaker, but there is audio from the 
headphones. I checked the speaker and cable with a ohmmeter and things look 
ok. Elecraft suggusted that the headphone jack might be bad, but I had never 
used it before this and the audio was ok from the speaker then.  Everything else 
is working fine including the NB  Has anyone else experienced this problem?  I 
might add that I did not build this K2 but aquired it total built and working 
100%
Any help would be appreciated.

Ken   K1DWZ