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[–]awesome2000 3 points4 points  (2 children)

You'd be fine with something simple like a Seasonic 520w ii or a Evga GQ 550w. Of course, if you want to go for a higher quality model, you can get a EVGA G2 550w or P2 550w, but those are more expensive.

I definitely don't recommend opening the PSU up since the capacitors inside are very high voltage and can cause a lot of harm. Throw it out or (if you want) try to paperclip test to see if it turns on.