[Elecraft] Front panel phone socket - K3

[Johnny Siu]

Hello Group,
I have an earlier version of K3 though I keep updating its hardware + firmware to the latest standard.
Now it develops some problem with the front panel phone socket.  Even after I pull out my headphone jacket, no sound is coming out from the internal loudspeaker.  On the other hand, if I config the menu SPKR+PH to YES, the sound comes out from the internal loudspeaker again.
Is this indicating a defective front panel phone socket?  Or, is there any other areas I should look into?
Looking forward to your advice.
73
Johnny VR2XMC