Crazy Distorted iMac display - Is it the video board?

This iMac just came to me so i don't if there were any symtoms leading up to its failure. It will only boot from CD and when it does the display completely distorted and pinched... take a look:
http://homepage.mac.com/mikeneuhaus/PhotoAlbum6.html
I'm guessing the video board is shot but I'm not sure. Any ideas?

The fact that it won't boot from the hard drive, but only from the CD, sort of indicates that the hard drive is dead. I say "sort of" because you'd have to test it to be sure. Those pictures seem to indicate an issue with the "firing" patterns of the monitor, "the yoke", as David Jenson mentioned. RGB (red, green, blue).
It's too dangerous to play around with the yoke adjustments in these CRT iMacs to be worth the risk. But if you decide to do so, be sure to use a CRT discharge tool first. However, with a dead hard drive, as well as a messed up CRT monitor, I'd consider that iMac to be best used for spare parts, unless you have another one that you can get spare parts from to repair this one.
Donna

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Crazy Distorted iMac display - Is it the video board?

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