[Elecraft] [K3] Err 12v

[Randy Moore]

I am working on an friends K3 (#4446), recently purchased used.  When I 
got it, Power-On resulted in "ERR DSE." Firmware load failed, so I did 
EEINIT, and then the firmware (4.22) loaded correctly.  After going 
through filter setups to match the on-board filters, things seemed to be 
working correctly.  But then I tried to increase power beyond 12w, and 
now I get the "ERR 12V", which my friend had seen before.  When that 
error occurs, the KPA3 fans come on.  The manual says to reset the 
circuit breaker, but it wasn't tripped.  Just for kicks, I tried to do 
the Tx Gain Calibration through the K3 Utility (dummy load attached), 
and even at the 5w level, it fails.

I need some advice on how to proceed.

Tnx es 73,
Randy, KS4L