Light on motherboard and front panel of case but doesn't turn on

[jackjack]

So i decided to build a new computer and i got everything connected, hit the power button and the computer wont power up. I have made sure all the power cables are connected well but nothing.

using a intel dp55wg mobo
intel i5 processor
coolermaster gx-750w power supply
xion axp 100 series case.