Power to motherboard, But motherboard wont turn on

BayArea

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Me and a friend are working on a new build, and we have been having complications with the motherboard not turning on when using the on-board power switch. Everything is plugged into its respective locations on the PSU itself and the motherboard.

Below will be pictures linked of the cables plugged into the PSU and into the motherboard. We aren't the most experienced so it might be the tiniest thing that we are missing.

http://imgur.com/Wgvgbc3,pyOd1vE#0

http://imgur.com/A1F4DQq

Any help is appreciated.

EDIT: Please note that we had the system running yesterday. But now it won't run at all.
 

BayArea

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Yes it is an on/off switch on the motherboard. Nothing happens when we try turning it on and yes the on-board switch is lit up. When it usually isn't if there is power being supplied to it.
 
Are the GTX 770 hooked up with a SLI bridge? But for this test, can you just remove both GTX 770 from the motherboard and detach them from the PSU and try again?

You can short circuit the power switch on the motherboard with something metallic.
 

BayArea

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Do we still need to short circuit the motherboard even if we have a power switch already on it?
 

BayArea

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We followed that. The thing is that we had it running yesterday and today, but when installing windows 7, it didnt detect any drives, so when we were trying to fix it, it didnt start back up.