How do you reset the PMU on an ibook G3?

My man just got a refurbed ibook G3 and on the first night it went to sleep and it won't seem to charge and I've read that the PMU needs to be reset but I don't know how to do this. Can someone help?

See this article:
http://support.apple.com/kb/ht1431
Jan

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How do you reset the PMU on an ibook G3?

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