Computer powering on and then instantly off

[jamiestivala]

So it all started with me leaving the computer on whilst I go to drive someone home. And then when I came I noticed the computer off.

I pressed the power button and the computer turned on and off. Not even a second. At first I thought of replacing the PSU. No luck. So then I tried replacing the ram. No luck. It's not even beeping...

Tho the CPU fan and GPU fan and system fan are lighting up.

So now I'm down to either the CPU or motherboard. I am thinking that it can be the motherboard but I'm completely unsure and don't wanna spent extra money.

CPU: 4570K LGA1150
Motherboard: Gigabyte Z87-HD3.

Note: No burning sounds or smells and no visible Capacitor seems to have been destroyed.

Any support would seriously be helpful before I go buy a new motherboard.

EDIT: PSU is works with different hardware cause I did have a spare computer but with a different CPU slot.

 

[jamiestivala]

So I was able to fix this.

First I unplugged everything and used some compressed air to remove dust from inside the RAM slot and some front panel pins.

Then I inspected the CPU pins and noticed that some pins we're bent so I used a very fine piece of metal to align them (otherwise known as a sanded paperclip) and boom it booted after I installed RAM and CPU. I was a lucky one