[Elecraft] KPA100 - Super problem

[F5UL]

Hi, Don and all the list

Lasr Sunday, I was page 53 of the KPA100 manual, with every steps OK all the 
way up to securing the shield  and closing the box!
I had a very nice output, the KPA100 being direct with the K2 or with the 
remote EC2 case, Once the shield in place and verified for bad contact and 
so on, the next power up was a disaster.
I did not switch to transmit!!!
The resistors R21, R33 where burned out, RFC also, and after excanges with 
Don WFPR, diode D12 and D14 where also found in short. R22 and R13 where 
very hot,
and the curent on the K2 display was about 1.6 A.
So all off and after replacement and checking i'm at the following stage :

with only the KIO2 connection or direct connection the curent flow from 
12CTRL is around 1 A on the K2.
Without PA power, only the KIO2 connection I do not get the NO PA PS 
information when turning on the K2. R13 is still very hot and R21 is hoter 
than normal. Pin #13 of U shold be at +4.9 V and insteed is at 0.1 V, as PIN 
#14. The 125 V is OK on R11. If I plug on  the PA PS, I can not turn off the 
K2, his supply being done via 12CTRL line, either through the KIO2 or direct 
connection to J4. If I try to transmit even at 11 w level, I get a black 
cloud of smoke with R21 and R13 going "blam"

I'm lost, Don , I changed the cap for .22µF and it's OK.

Hoping for help from anybody

Regards F5UL Bob