Fairly new PC Build

Last night I switched to a more sufficient/reliable case and I ran into one issue. All of the power connectors are connected via motherboard and cpu etc. Motherboard is receiving power but no Post message (not even booting). This build worked before the switch and Im curious as to what I might be missing or what I might have done.

PC Specs :

ASUS Sabertooth Z77

750 Watt PSU

Intel i5 quad core 2500k (Sandy Bridge)

Nvidia 560 Twin Frozr 

G.Skill 2x4gb (8GB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Are you able to post a picture of what is on the inside of the case? Where all the leads are running to etc?