[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 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.  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.

The seller of this K3 says none of this was happening before he shipped 
the unit.

I need some advice on how to proceed.

Tnx es 73,
Randy, KS4L