The specific screw supposed to be located in the little hole on the right side of the photo, moved close to a component which then melted almost entirely before creating a short circuit (the brownish leak below the white connector).
So if you have a PowerBook 17" and experienced a problem with it, or had to change the logic board, then you might have been facing the same issue.
If you own a PowerBook 17" we would advise you to quickly check if this screw is tightly fixed. In any case, we want to hear from you in the dedicated topic of our forum: here.
Since both defective PowerBook 17" were 3 to 4 years-old, they could not be covered by an Extended Apple Care plan. So if you are skilled enough, it might be important to disassemble your PowerBook to check all screws supposed to fix the logic board to the notebook case.
