psu kept blowing fuse (blue flash from psu

) fitted a new psu on pc to check, didnt blow but just sits there with fan working and green light on but nothing else so i guess motherboard has blown.
so bought a new pc and need to slave old sata drive as 2nd hd (seagate 120g barracuda) on new machine to access data, my question is would i be risking blowing new pc if there is a possible fault on the said drive please?
(i also want to transfer m-audio sound card) thanks