EDITED IN LATER. A byproduct of the reversal of plug-sensing below, was that it kicked the speaker detection into gear. I put the plug in the back and it worked. However, the front kept reporting that I was putting a speaker into it. 30 secs, then again. that sort of timing. I guess that's why the wire was hidden under the M-board!!!!!
Is the detection just a switch on the plug or is it a kind of plug and play intelligent sensing?
It gets worse!
Took mother board out cos one of the ribbons to the front panel was trapped under it. I'd been meaning to rebuild it, but time.......!
Ribbon freed and joints checked to rear connections with a X10 loop. Ribbon plug clearly marked F_Audio Never been used.
Plug it in to socket marked thusly.
It can only go one way round. The system detects a Microphone before anything plugged in.
I put speaker in the green front plug and menus pop up all over the place.
When I pull it out, they tell me I now have a speaker in the front.
Please help me refrain from putting it in the nearby canal.