Just feedback, I´m not sure I have totally solved the problem, I suspect that, although it's still keeping time, it´s about time to change the battery (lithium 3,6V 1,1 AH) on the motherboard. What I did was a search and found these sites:- http://tinyurl.com/y94b2p http://docs.info.apple.com/article.html?artnum=300574 http://docs.info.apple.com/article.html?artnum=95035 After having read them I reset the PMU and it´s now s back in working order, for the time being, Monday I will get a new battery. Thanks for the response. PS Have removed thread to make this smaller -------------- next part -------------- An HTML attachment was scrubbed... URL: http://listserver.themacintoshguy.com/pipermail/g4/attachments/20071209/2613fdb9/attachment.html