I would blow any dust out, and do a basic visual inspection of the logic board before you power it on. Macs of a certain age (like that LC630) have PRAM batteri

I would blow any dust out, and do a basic visual inspection of the logic board before you power it on. Macs of a certain age (like that LC630) have PRAM batteries which may have leaked/exploded, and capacitors which also may have leaked.