Received a eMac G4, doesn't show anything on the screen

Today I was able to get my hands on this computer. This is the first Macintosh I got that seems like its worth fixing. My problem is that while the computer seems to boot up fine, I cannot get anything to show on the screen. I am guessing the video card or the CRT is bad (worse case scenario), but since I am new to Macs I was wondering if someone more experienced could give me any clues as to whats happening here.

Here is a video I made of the computer, if that helps

http://www.youtube.com/watch?v=ukH6ovQg9Uc

CubeHacker said:

Do you feel the CRT degauss when you turn it on? Its perhaps just a loose cable inside the machine. At worst the CRT is dead. You can open it up to take a look inside, but be VERY careful when poking around with the CRT - it can hold several thousand volts and can kill you.

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I have dissambled monitors (although these sit outside for months before I touch 'em so I know they're dead, and I just play with the circuit boards) before, so I know the dangers and I am very careful when dealing with CRTs. I try not to mess with the CRT itself, so if this is a complicated problem, I'll just throw it on the scrap heap. And yes, I did hear the CRT degauss, I dont know if you can hear it in the video or not.