First Build; Mobo power light is on but computer won't start

JKillz

Honorable
Oct 12, 2013
3
0
10,510
So I just started my first PC build with basically no actual hardware experience. I planned to do a test boot outside my case but that plan fell through because I am using an H100i for my CPU cooler. I installed everything into my case except my hard drives, set up the CPU cooler wired everything to my power supply and decided to do a test boot before I installed my drives and finished cable management. My Mobo power LED turned on, but the power button on my case did nothing. To make sure I wired my Q-connector right I tried shorting it but still no dice. Literally nothing is happening, no fans spin, no noise. I'm pretty sure my PSU is good because of the Mobo light and I think all my connections are secure so does anyone have any suggests to get it working? Thanks.
Specs:
i5-3570k
Asus Sabertooth Z77
Corsair H100i with SP120's
Asus Geforce GTX 780
Corsair vengence LP 2x4GB
Corsair RM 850 PSU
Samsung 840 120GB SSD
WD Caviar black 1TB
Corsair Carbide 500r