Thanks for the suggestions chaps.
OK, all working again now, it appears that the power switch connection was already faulty as five minutes with a soldering iron this evening and hey presto!
And now for the apology part - I, Jabo, wish to apologise to all the DDz who were online last night and witnessed my outburst. All I can offer in my defence is that I was under significant duress so if I offended anybody, I'm sorry.
~S~ Jabo