[Elecraft] KX3 High Current causing fold back

[SouthCarolinaDolphin]

I had sent a post several days ago but don't see my post so will repost. 
I have KX3 which in sn in 1100's. I sent it back for a mother board upgrade and also a new bnc ant connector with 2 m suppression. It has worked fine until last few days when I started getting high current warning the it folded back to 5 watts. Tried it on other bands c same problem. Tried on 50 ohm  dummy load. Took slightly longer but same result. Also saw high current only once on receive. Any ideas???
Thanks 
Hugh W4DRH


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