[Elecraft] K2 voltmeter

[wsm at amaonline.com]

Hi
K2 #5846
Well here I go showing my ignorance again!

I'm trouble shooting the volt meter in my K2. It works fine on
reading internal voltage, but doesn't work at all on external
voltage. Have re-soldered all the joints on the control board and
check R9 which is connected to pin 2 of P7 and to pin 5 of U3B.
I get nothing across R9, as in open circuit. I'm checking it in
circuit, but shouldn't I get some kind of resistance reading across
it with a meter?
Thanks
Scott N5SM