[Elecraft] KIO2 troubleshooting

[Jason Marten]

I don't think it's a problem with the jack screws, as they back out 
completely into the housing, and I can plug in the cable all the way to my 
computer and KIO2 board.

My biggest concern is that P4-7 on the control board is putting out 0 V.  
>From the troubleshooting section of the KIO2 manual, it says that J2-7 (and 
also P1 and J1, because they are connected in parallel except for pin 8) 
should have 4.5 V, and J2-7 mates with P4-7 on the control board.

If I do hook up the KIO2 to my serial port with the computer on, J2-7 drops 
down to -4 V or so.  The manual says to unplug it from the computer when you 
do the reading, however.

Any ideas?  The only thing I did on the control board besides clipping the 
leads on P5 was tighten U4 because the bolt was a little loose.