New motherboard case and cpu.wore a static bracelet. Power button is fine.psu fine. Nothing mobo to short it. Bypassed power button.samething.checked with and without rams. Removed battery and pwer. Still no change.its a h170 plus with i5 6400 cpu.diypc case gamerx-w. It has a straight 6pin plug named power I have no idea what it's for coming from the case switch plate at top. Asus just suggested to replace it for faulty new motherboard. Is there anything the tech support and I missed maybe?.