Stuck on gray startup screen, no apple logo - help?!

My Powerbook chimes when I turn it on, then goes to the gray screen, but sits there, does not move forward, no apple logo, no spinning circle, no beachball, nothing. I can hold the power button to turn it off, again to turn it back on, etc., but nothing else. I tried starting in safe mode, same exact result. Tried starting from the leopard install dvd, still nothing. The DVD drive makes the noises as if it's reading the disc, but the computer does not get past the gray screen, and now I can't even get the disc out. Any recommendations??

Jason: Your present situation is not clear from your posts. Do you still have an installer DVD stuck in your optical drive? When you power up the machine while holding down the "c" key with the installer DVD in the drive, does the machine start up? If not, exactly what does happen?
Presumably there is an OS installed on your hard drive, because if there weren't, you would never have been able to get onto Hotmail. Does the Powerbook start up from its hard drive when no installer disc is in the optical drive? If not, exactly what does happen?

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    If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

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