[Elecraft] "Low Gain Ratio" Hard Fault

[Cono DelRosso]

Hello, 

I have a KPA1500 Over a year old, Came back from Elecraft on May 2021 for 12v supply connector issue repair.

Does anyone have experience handling this particular hard fault  "Low Gain Ratio”

Now I have low output 30w in only puts out 400watts

Cono, W2ZMZ