IMac blank display

I walked away from my iMac this afternoon and came back and the display is no longer working. I have tried restarting it as well as the support offered on Apple's site here - http://docs.info.apple.com/article.html?artnum=303138
My problem is there as
Your Intel-based iMac computer's display has no picture after you turn it on.
But the solutions do not work. Does anyone have any other ideas? Otherwise I have to drag a 24" iMac into the Apple Store on public transportation (not going to be fun).
Thanks in advance.
ibook G4 1.33GHz Mac OS X (10.4.8)

Unfortunately you have done as much as you can without Apple help
Consider taking out AppleCare to give you 3 years of warranty cover from the date of original purchase
chris

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IMac blank display

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