Pc won't turn on, no response from pressing power button (no POST) (Custom, self-built, hasn't booted up at all)

Specoppotato

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Jul 19, 2014
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Whenever I press the power button (both on the case and on the motherboard itself) nothing happens. Fans don't spin, case LED's don't light up, monitor doesn't pick up a signal (tried both GPU- GTX780 and motherboard HDMI output) I've done everything on this thread (http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems) I can't seem to figure what is wrong.
Specs are:
Mobo: Asus Maximus Hero VII
CPU: i7 4770k
PSU: Corsair 750 (non-modular)
RAM: Corsair Vengeance 1x8gb 1600mhz
GPU: EVGA GTX 780 SC (reference card body/casing)
Case: NZXT H440

Note: This might be part of the problem: When I first built the pc, the motherboard was an MSI z87-gd65 but it had a corrupt bios and I ended up asking for a refund and buying the asus one. Maybe it has permanently damaged either the cpu or the psu? I wouldn't know.

Thank you for reading, and please help me.
 

CraigHarrison

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Jan 23, 2011
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How on earth is a BIOS update going to help, if he cant get his PC to even turn on?