Computer won't start up

[Dubesta11]

I just built this:

 

PCPartPicker part list / Price breakdown by merchant / Benchmarks

 

CPU:  Intel Core i5-4670K 3.4GHz Quad-Core Processor  ($189.99 @ Micro Center) 

CPU Cooler:  Corsair H55 57.0 CFM Liquid CPU Cooler  ($65.49 @ Mwave) 

Motherboard:  ASRock Z87 Pro4 ATX LGA1150 Motherboard  ($109.98 @ SuperBiiz) 

Memory:  G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory  (Purchased For $40.00) 

Storage:  Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive  ($59.24 @ Amazon) 

Case:  Cooler Master Storm Enforcer ATX Mid Tower Case  (Purchased For $40.00) 

Power Supply:  Corsair CX 750W 80+ Bronze Certified Semi-Modular ATX Power Supply  ($89.99 @ Newegg) 

Other: GTX 660 Ti 2048MB (Microcenter, Boston, Referb) ($160.00)

Other: Nzxt G10 ($30.00)

Total: $784.69

(Prices include shipping, taxes, and discounts when available.)

(Generated by PCPartPicker 2014-05-11 15:38 EDT-0400)

 

When I completed the CPU installation, I did a dry run with the power/gpu and everything worked and was able to boot into the bios. I then threw everything into the case and screwed it in, plugged everything in, and then tested it, and it worked. Today when I brought it over to where I have the internet to install windows, it doesn't want to start. When pressing the power button, all the fans spin and lights light up for about half a second, then it shuts off. Any idea of what could cause this?

[Guest]

Make sure all the PSU cables are correctly plugged in.

[LogicalDrm]

It must be loose cable if you have it running ok earlier.

[d33g33]

Reseat your GPU and RAM just in case. Also make sure your CPU fan is connected well to your CPU_FAN header on the motherboard. It could be turning off after detecting no RPM. Come back to us with what happens.

 

Also if you can, take photo's (close up) of all connectors and we can have a look around for you. The more eyes the better for you.