The original poster has done just that! I found a local repair facility who was able to replace the PSU but it still don't work! Might be the motherboard. Anyway, so far it's cost me about £85 and much as I love it I'm not prepared to spend more on the basis that it might work. If I were in the UK with my old workshop and lots of UK contacts I'd have a go myself. But I'm in Spain in a fifth floor flat with poor Spanish - so I've just purchased an iMac 21.5 2.7 Ghz. Hopefully it'll last me another ten years!
Thanks Milo and Mixture for your help.
Last edited by Sunnyjohn; 30th Sep 2012 at 22:27.