[Elecraft] KIO2 busted?

[Nick Waterman]

There's an old chap in my local club, CW demon, able to hold 2 CW QSOs
on 2 rigs and chat to someone in the shack simultaneously. Recently been
quite frail after a collapsed lung, and I was visiting him to mend his
antennas for him. He has a K2, with which he's won all sorts of QRP
awards and contests for himself and the club. He was mentioning that his
KIO2 doesn't work any more.

Turns out he's used a standard serial cable with it. He doesn't seem to
have toasted his PC, because he can still control his other rig(s), but
I suspect he's toasted the KIO2.

What are the components that are likely to need replacing? I'll add them
to my inevitable next Elecraft order for him.

-- 
"Nosey" Nick Waterman, G7RZQ, K2 #5209.
use Std::Disclaimer;    sig at noseynick.net
Two wrongs do not make a right: it usually takes three or more.