[Elecraft] K3 - CW Paddle input failure

[w4sec at windstream.net]

I turned on my K-3 #3096 today and it seems that the paddle "tip" input has stopped working. The sleeve input works FB. I have swapped dits & dahs on the tip/ring in the menu, and the problem stays on the tip input. Checked my Paddle/cable - all is well there. Before I dive head first into troubleshooting, is there any known hardware/software/illegal menu settings that i might have missed? 
Thanks,
-Pete
--
Pete Axson
W4SEC
17901 NE 18th Ave
Citra, FL 32113