bp fick
Super Member
Not sure if your G4 is a aluminum or titanium they are a little more difficult to work on. Just trying to get the case off without damading it is an art. Did you try a Mac store? They probably would have the best qualified personell to repair a Mac.
Typically, the Apple Store stops assistance on machines older than X years. The G4 fits the "ceased support" age group. Simple enough to understand, as they cannot keep their techs up to snuff on all these older models.
An independent is actually a better solution on older hardware.