[Elecraft] KPA100 HELP!!!

[Chris Hurlbut]

I posted a couple months ago with a problem I am having with my KPA100.  
Life has gotten in the way, and I didn't get fully through the 
solution.  Someone, I think an N9?, was helping me, but I had a HD crash 
and lost those emails.

The short story is a screwdriver was dropped into the open K2/100 during 
final testing stages, just before I got to the bias adjustment.  Things 
sparked real pretty like, and the K2 no longer recognized the KPA100.

I replaced U2, U4, and U5 (I think that's right.) I also replaced Q6, 
Q7, Q10, Q11, Q12 and R8. 

The K2 now sees the KPA100 well enough to give me error code E12 and 
Firmware version 1.10.  I can't get the K2 to see that the high power 
12V supply is plugged into the KPA100.   I always get a NO PA PS 
message, hence the E12 error. 

I get 13.8V into R8, and 0.8V out of it.  Then I get 13.8V into Q12, and 
0.8V out.  Thus, Pin 7 of U1 only has 0.8V.  The manual says it needs 
4V, and I can't find a 4V reading on anything, anywhere. 

The K2 turns on just fine with *just* the high power 12V supply plugged in.

Any ideas, anyone?  I really want to get this thing going!

Thanks,
-Chris KL9A