brian whatcott wrote:
Take it to an avionics shop. Over many years of aircraft ownership
I've been known to open up a com radio or a VOR head and do some owner
maintenance but I have never found anything in a transponder to be
within the grasp of someone who is not trained in such maintenance.

-Robert

That sounds like a smart response.
Who is going to be able to trace the intermittent solid-state path of
the squawk Ident switch??

My A&P is shipping the KT76 to a place in Texas for repair.

I don't expect it back in the aircraft for a couple of weeks.