Restarts 2-3 seconds after shut down, tried everything

[sevenscrew]

Just built my first computer and I'm pretty confident everything is installed properly.
Here are the specs:
ASROCK Z97 Fatal1ty killer
EVGA GTX 760 2GB
PSU SEASONIC SS-750km3
SSD 128GB SAMSUNG
CPU INTEL i5 4670k 3.4G
DVD BRN ASUS DRW 24B1ST
MEM 4gbx2 GSKILL ddr3 1600
CPU COOLER CM RR-212E-20PK-R2 R


I've tried basically everything I found online to try

Will update later with what I tried.

Will stay off, if i hold down power button for 6 seconds. But if shutdown normally, will just restart.

 

[Paul NZ]

Nothing yet from Asrock

 

[fork8383]

I know this is old but did anyone find anything out? I have the same motherboard and have also tried everything.

 

[fork8383]

i also found out that if i hold the power button, it will stay off. I have basic knowledge of computer, would that mean a component is not draining of power and kicking back on? So it could be my PSU or MOBO? I just built this computer last saturday and it has been doing it ever since.