Blackscreen, chime sounds but nothing happens, help pls!

as preface the powerbook's dvd drive as on all of my powerbooks does not work anymore....
when i press the restart button the chime sounds and there is some HD acivity but the screen stays black, this happened after it was working just fine and i did a restart. i tried pressing the restart button for a while to reset. nothing.
thank you!

About the only thing you can do is to reset the PMU and PRAM, and try a safe start. If none of those work, without a working DVD drive, or the ability to see anything on the screen, it's a trip to your local Apple store or Apple Authorized Service provider.
PMU reset: http://docs.info.apple.com/article.html?artnum=14449
PRAM reset: http://docs.info.apple.com/article.html?artnum=2238
Safe start: http://docs.info.apple.com/article.html?artnum=107393
Apple service provider locator: http://www.apple.com/buy/locator/service/ (this is the US locator, there is a similar one for each country too).

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