[Elecraft] Scary K2 event this morning!!

[Eddy]

To K2 Wizards et al
 
A scary event this morning involving my 3500+ K2 which was
realigned by Gary a few months ago…..by-the-way, Gary did an outstanding job
and my K2 never has worked better!! 


This morning, K2-100 and KAT100 tuner, rig was working FB
Tuesday night, I turned it on from cold start in cold room this morning and the
K2 cooling fan immediately started running…..weird……when I transmitted I
immediately (remember, rig is still cold from sitting overnight) got a PA HOT
error message!!!  The K2 heat sink was
cold to the touch, by-the-way.
WTF!??

Powered off K2, turned back on and same error message.
Next  time, power K2 and 12vdc supply. Powered
back on DC supply, then K2 and got same PA HOT message….now it’s getting scary!

WTF…….I pull off all cabling and run K2 into dummyload.
Power back up and PA HOT error again! Now I’m considering a hardware reset which
I really don’t want to do.

So…….for grins and gigglys this time I turned K2 off, DC
power supply off and removed the 12vdc cable  from back of K2 and voila, when I reconnected DC power, K2 operating
normal again and back on air making 100w thru KAT100 into dummyload and into
dipole.
So, for my K2 wizard friends, any thoughts what happened? I’m
thinking a relay got “suck” in some weird state and took all this to get everything
reset again?

I do appreciate any and all advice y’all can offer.
73
ed