Grid already mentioned this but I'd like to reiterate if you don't know what you're doing inside CRTs you can easily send tens of thousands of volts through your body by poking the wrong thing. That'll kill you.
(At a bare minimum the "flyback transformer" is the name of one of the components you really, really don't want to touch, and that suction cup thing right on top is part of it. Google that.)
I'm all for saving it & getting it going again, but do some research & figure out exactly what you're doing, especially if you're fiddling inside it with metal tools. Or better yet, if it works, close the case and don't.
That said, please show us a picture of the connector on the back. I can almost guarantee it isn't VGA, even if it looks like one.
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