[Elecraft] K2 No current display

[cmeagher at dodo.com.au]

My K2 has recently been repaired after a polarity reversal of amp
connected to it blew out the bnc connector.
It works all OK, except that when I switch the display to show
Volts/current, the current stays on i0.00.
I have checked the current sense resistor voltage drop is OK for both
RX and TX, and the voltage is showing 
at control board MCU pin 4 ( current sense input). (0.013 volts RX,
0.11 volts at 10W TX).

So at this point I'm stumped. Faulty MCU chip? Any advice on/off the
forum would be appreciated.

Chris VK2ACD

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