Extreme 4 z370 wont turn on

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Just
 finished building new computer. Had everything hooked up and 
motherboard just flickers for a split second when I turn the psu on. 
Power button on the case doesnt turn anything on either. I took everyone out and down to only the mobo being plugged in to the psu with the correct cables (the 8 pin and larger 24 pin) and still the same thing happens. i cant figure out if its just a short or the mobo is fried. thank you for in advance for any help!

Specs: Asrock extreme4 z370
 I5-8400 
Corsair full tower carbide 600c 
750w corsair psu 
Coolermaster evo 212 
Viper 16gb ddr4

https://youtu.be/7Ytha4WmHbE Heres the flicker

UPDATE: tested it with another known working PSU to same results :-(

Edited by monj - 20 Aug 2018 at 5:05am

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monj Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Aug 2018 Status: Offline Points: 4	Post Options Post Reply Quote monj Report Post Thanks(0) Quote Reply Topic: Extreme 4 z370 wont turn on Posted: 20 Aug 2018 at 3:45am
	Just finished building new computer. Had everything hooked up and motherboard just flickers for a split second when I turn the psu on. Power button on the case doesnt turn anything on either. I took everyone out and down to only the mobo being plugged in to the psu with the correct cables (the 8 pin and larger 24 pin) and still the same thing happens. i cant figure out if its just a short or the mobo is fried. thank you for in advance for any help! Specs: Asrock extreme4 z370 I5-8400 Corsair full tower carbide 600c 750w corsair psu Coolermaster evo 212 Viper 16gb ddr4 https://youtu.be/7Ytha4WmHbE Heres the flicker UPDATE: tested it with another known working PSU to same results :-( Edited by monj - 20 Aug 2018 at 5:05am

dima34 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Aug 2018 Status: Offline Points: 1	Post Options Post Reply Quote dima34 Report Post Thanks(0) Quote Reply Posted: 20 Aug 2018 at 7:21am
	Having the same issue - won't power up outside the case when plugged into power supply. Just bought a new power supply to troubleshoot - same thing happens.

monj Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Aug 2018 Status: Offline Points: 4	Post Options Post Reply Quote monj Report Post Thanks(0) Quote Reply Posted: 02 Sep 2018 at 7:14am
	Found out it was a faulty MOBO. RMA'd it and new one works just fine