Pc not booting at all

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   when i try to power on my pc nothing happen, tho all fans are spinning and seems that everything got power ,but da motherboard has only cpu led is on ,and dr.debug codes are off,they never give any number or anything . what i've tried so far:
remove and plug every single cable to motherboard , use only 1 ram reinstall gpu and cpu to mb and made sure that everything is settled 

till now nothing happening ,pc not booting and only this red led "cpu" is on 

specs:
asrock formula z77 oc
gtx 780 evga
3770k intel core i7
cooler master 725 extreme psu
4x4 hyper x blue ram

appreciate any help on that matter and thank you

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perfectyuda Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Dec 2017 Location: Alex Status: Offline Points: 3	Post Options Post Reply Quote perfectyuda Report Post Thanks(0) Quote Reply Topic: Pc not booting at all Posted: 30 Dec 2017 at 7:03am
	when i try to power on my pc nothing happen, tho all fans are spinning and seems that everything got power ,but da motherboard has only cpu led is on ,and dr.debug codes are off,they never give any number or anything . what i've tried so far: remove and plug every single cable to motherboard , use only 1 ram reinstall gpu and cpu to mb and made sure that everything is settled till now nothing happening ,pc not booting and only this red led "cpu" is on specs: asrock formula z77 oc gtx 780 evga 3770k intel core i7 cooler master 725 extreme psu 4x4 hyper x blue ram appreciate any help on that matter and thank you

Tzvia Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 31 Dec 2017 Location: Los Angeles Status: Offline Points: 1	Post Options Post Reply Quote Tzvia Report Post Thanks(0) Quote Reply Posted: 31 Dec 2017 at 1:31am
	Has anything changed between the last time it worked and now? Make sure that you have connected everything required from the PSU (second motherboard power connector, power connectors on video card). You can also try clearing the CMOS if you have not yet done so, and booting with NO ram installed (and no video card) as the motherboard should beep the bad ram beep. If you don't get the bad-ram beep, it's not even starting a post. Most commonly, would be a PSU issue, followed by motherboard and then CPU. If nothing gets any sign of life from it, I would take it apart and assemble it on a cardboard box, and try booting with just the CPU and motherboard, listening for the bad-ram beep. This would eliminate any issue with a short to the case. If nothing, I would remove the CPU, check for bad pins, and reassemble. Being on the cardboard box makes it easier to work on it. Good luck.
	Tzvia