Is it possible to repair a faulty Power/Analog Video board?

I've had several CRT iMacs over the years and am on my third and fourth ones that have defective PAV boards in them. These are getting hard to find. Does anyone know what component(s) typically fail on these? Is there a repair procedure that I could have an electronics repair wizard attempt? I've been searching and can find references to flyback transformer repair on the tray loader machines but so far haven't found any information on the slot load machines. Any help would be appreciated. Even though these machines are pushing 9 years old they're still useful for kids and older people who just need to access the internet.

Here's a link:
http://www.avnr55.dsl.pipex.com/dotcom/panthereatsimac/tray.htm

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