[Elecraft] VFO B dead

[Gary K9GS]

I just had my K3 in for service and a checkup.  I REALLY hope I can avoid sending it in again. The VFO B knob is completely dead.  Turning it does not tune VFO B.  Also tried the config screen...same thing.I suspect the encoder is bad but it showed no symptoms prior..otherwise I would have had it changed out when I sent it in.All other front panel functions appear to work.Any ideas?73,Gary K9GS