H81M-DGS R2.0 Powerup Issue

This is the first time writing in a Forum such as this.I have been building rigs/Systems or whatever you want to call them for more than 15 years. But this time i need Help.

I built myself a nice little moderate gaming rig due to some financial shortcomings.(details will follow)

it hast been running for little over a Month now. Its running almost 24/7. This Morning it was in sleep mode but wouldnt wake up no matter what i did. Since i had that issue once before i turned the psu off (power button wouldnt work either) and back on. Last time it worked this time nothing. this was roughly 14 hours ago. I completely checked and rechecked everything. Button is ok Psu is perfekt reset CMOS pulled the battery for CMOS AND set the jumper and tried only doing one of those at a time. Only reaction i could get from the Board was a little flashing lights in my g15. Nothing else.

My System:

Asrock H81M-DGS R2.0

i5 4460

8gb DDR3 1600

hdd 2xsataII 1tb&2tb

Geforce 560 GTX

PSU: Thermaltake cable management 750W

DVD/RW

Everything in an old but very nice and well handled chieftec tower. 

Thanks in advance.

Asko aka Ben