In message tnrje.50265$yV4.992@okepread03, Karl
writes
First thing. Also I have removed and checked the jack, it's ok, and there
seem to be no visual anomolies with traces or components. I need a
schematic.

Most useful audio checker is a pair of headphones wired to a probe with
a 0.01yF in series on one wire and a croc clip on the other. You can
poke around looking for audio to your heart's content. Just wire up a
phone jack to plug into to avoid tieing up your phones.

Mike
--
M.J.Powell