My PC Won't Boot Up

[suomilaava]

So. I Have these parts [ Kingston 120gb SSD, Kingston DDR4 ram 8gb in 2 slots, ASUS GTX GEFORCE 1060 DUAL 6GB, Intel Kabylake i5 7400, Seasonic bronze 520w and supposingly the problem: ASUS B250M Mortar motherboard....

So. I have built this PC 3 times, all the cables are checked, CPU's pins are fine and RAMS are correctly inserted. GPU's light is white and goes on when power-supply is turned on[Its red if it wouldn't get enough power]. CPUs, GPUs and the front fans are all turned on once i press the power button in order to start the pc.

The problem here is that B250M Mortar has these lights for every part on it, that will light up every few seconds if there are problems with some parts and the light is burning for RAM and CPU even though they look fine to me and there seems to be nothing wrong with them. Also if im trying to boot my pc up it doesnt show anything on the screen and the question here is:

What do you think, which part(s) is(are) not operating like they should or are broken... is there anything i should know/check/fix? I'm thinking its the Motherboard, and few other people think its the motherboard too... but i figured i could ask more experienced people...

Thanks

 

[cin19]

Remove the 120GB SSD and gtx1060, use onboard iGPU, and only one stick RAM, unplug the power core from wall outlet, clear the CMOS. After that boot the PC to see waht happens.