Thanks for the replies, guys.
I'm starting to realise, that I have really messed with something that I am not qualified to. [:'(]
I've tried unplugging as suggested - no changes. The only thing that happens is that the LED flashes when I push one of the buttons.
With regards to the "programming umbilical" I suppose this refers to the cable between the socket box and the main unit. Alas, I didn't even know that I needed such a cable.
With regards to "retro-flashing" I don't really know how to try to reverse the situation. It would seem that I am stuck - and with myself to blame...
Any good ideas?
Moller