Has he connected the front panel power lead properly?
Tell him to try the screwdriver trick to jump start, it'll help him find out if the front panel leads are properly connected. Video that explains what I mean:
https://www.youtube.com/watch?v=FuPZlliGqBw
He should really route those cables behind the motherboard where possible, also tell him to move the ram to the second and fourth slots away from the CPU in order to activate dual channel.
Make sure the CPU power connector above the CPU socket has the right lead going into it, it should say CPU Power on the lead, not PCI-E.