[Elecraft] Added info KIO2 troubleshooting

[Dave Sublette]

Sorry... I forgot to say that I am using a short adapter cable, DB9-M to
DB-9F that eliminates all wire connections except for pins 1,2,3, and 5,
per instructions in the K2 Manual. It is new.  I just built it and it
checks out with an ohmmeter.

FYI This K2 has talked to this computer before, but has been through a
recent repair cycle.  The KUSB cable might be bad, but until I get
schematics or voltage table data, I have no way of knowing.  As I said
before, the DB-9 connector on the KUSB cable does get warm like there is
something at work in there.

Thanks,

Dave, K4TO