Star Wars Power Supply Issues

Hi All!

I'm having some strange happenings with my start wars. I wasn't
getting any voltage out of my old power supply so I replaced it.
Everything worked! Awesome. The next day it crapped out again.
Power supply isn't putting anything out (yea.. the big brick in the
bottom).

I haven't really troubleshot any of these before. How would I go
about it? Any common things I should look for/test?

Thanks for the help!

-Todd
.