[Elecraft] K3 - front panel issue

I just noticed that after a fun and uneventful (no failures) weekend of ARRL SS CW one of my K3s has developed a strange symptom. I have done nothing other than turn the K3 off last night and then on this morning. Perhaps I pushed something by mistake, but I have no idea what that could have

[Elecraft] K3 - front panel issue (update)

UPDATE: I did a CPU reset (NORM / POWER ON) and the first time nothing changed. The second time the RATE button worked once. Then no others worked, nor did the RATE. So, I did a third RESET - and now everything is working. Before doing the reset I saved my configuration and then reloaded

Re: [Elecraft] K3 - front panel issue

Ouch. Did you have an electrostatic event? All those buttons have one thing in common: They are using the signal SCANADC1 which is routed to input X3 on the HC4051 analog multiplexer chip U3 (front panel sheet 7). I hope this is not the case, but if that input is zapped, you will have the