[Elecraft] K2SB and HI CURRENT

[Tom Cleveland]

I have been using my K2 Barefoot(Sn 4065)  for a few years as CW only and love the radio. I recently assembled the KSB2 adapter 
and have a problem. When transmitting at any power level setting either CW or SSB I get a  HI CURRENT warning and the output folds back.

I checked a few signals and found that the ALC line was shorted to ground. After poking around i found that if i lifted pin 2 of 
U1 the Hi Current went away , and that PIN 2 of this chip is indeed shorted to ground internally. Rather than assume this is the 
only issue, wonder if i can get any suggestions on likelihood of a bad MCU, vs other causes. 

I have checked out D1 D2 and Q1 and all are okay, and the Cap is removed from the RF board.
Re-examined all the solder connections and part orientations. Other thoughts would be appreciated.

Thanks
Tom '3RSA