Homebuild won't post, won't beep

Hi All,
I purchased a new build "bundle" consisting of:
Asus M5A78L-M LX Plus socket AM3+ m/b
AMD Phenom II X4 945
Kingston 4GB 1600 M 9-9-9 DDR x2
Seagate 1tb serial ata hd
using integrated video vga

no posts, no beeps
followed the troubleshooting steps on this forum, no luck so far

re-seated CPU
re-seated mem
removed mem
re-checked wiring
started m/b and hd outside the case
still no post or beeps

called Asus customer support; the tech person suggested I send the m/b back to the retailer

I was wondering if there a way I can detect whether or not its a m/b issue?
maybe bad CPU, mem?

You help would be greatly appreciated