[Elecraft] K2 VFO problems

[Dan Grizzard]

Hello all,
I have finally gotten my K2 up and running on all bands. What started happening during the final assembly I&E speaker installation and top install, is that I cannot change frequencies after a short warmup, and sometimes from a cold startup. Sometimes spinning the VFO knob made it work for a short time. I had no problem like this during my search for low power out on 80 and 15 meters. (I found I had reversed two capacitors on those two bands.) I suspect a cold solder joint somewhere on the front panel board. Any other location suggestions are surely welcomed. I did remove and inspect the front panel board and reworked those joints looking suspicious but it did not help. 
Thanks in advance for your input.
73
Dan af4lb