I had no idea what you are talking about, but I found this that gave me a clue.
It looks like you should be able to pull what you want off the chip or get sync from the analog connector, but I really don't know.
What I do know is that a bad capacitor could cause the problems you are trying to solve and as stuff ages the it tends to eventually end up on the bad end of the bathtub curve.
So somebody did see it, sorry I can't be of any real help.
Maybe somebody will stumble in at some point.