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 symptoms
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 it
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
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