[Elecraft] KIO2 stopped working

[John Huffman]

Now that my KPA100 is working well, I'd like to return it to the EC2 case 
separate from my K2.  However, the KPA100 does not want to talk to the K2 
through my KIO2.  The KIO2 had been working at one time.

To be sure the problem was in the KIO2 and not the KPA100, I tried to use the 
KIO2 to talk to my computer.  It didn't work although it had worked fine in the 
past with both the KPA100 and the computer.  I conclude that since the KIO2 
won't talk to either, the problem is in the KIO2.

I inspected the soldering and all looked fine.  I checked the voltages in the 
manual and all seemed fine with these exceptions:
J1 pin 2 should be -8.0 measured -9.5
   same on U1 pin 5
J1 pin 4 should be 4.5 measured 5.9
   same on J2 pin 7
J1 pin 3 should be 0.1 measured 0.00
   same on U1 pin 2, U1 pin 4, U1 pin6

So, the voltages aren't wicked off and it used to work.  Any ideas on where to 
start next?

73 de K1ESE
John