hmmm, that video card isn't much (as in its 3-4 generations old), but your processor is old as well.
I think that mobo on your specs accepts Phenom IIs. Even a Phenom II 550BE would give you a good boost ($90):
your current processor vs 550BE...
try removing stuff and testing them one by one. test one video card at a time, then start adding components until you get a beep or an error message. remove all unnecessary USB for now.
what motherboard is this on?
So did you plug in the ATX 4 pin as well?
Do the fans spin at all (does it stay spinning and the screen is just black?), check if he has a microphone attached to the motherboard for beeping, some cases don't come with a beeping speaker.
That sucks. Cases usually are shipped in double boxes. They must be really careless to do that too because the ATCS is pretty tough. ugh, I can only imagine how annoying that is finally getting your shipment then finding out its damaged.