1 mont old PC won't start >_>

So a month ago, I built a gaming PC for myself featuring te next parts:

i5-4670k

Noctua NH-U9B SE2

Gigabyte Z97M-D3H

2x4 GB of Kingston HyperX Genesis 1600MHz CL9

Asus Radeon R9 280X DCUII

120GB Samsung 840 EVO

1Tb Seagate Barracuda

160GB WD HDD

500W Fractal Design Tesla R2 80+ Gold PSU

And a old case I scawanged.

Until today, it ran like a beast with the i5 running @ 4.2 GHz 1.25V and maxing out at 60's, but when i came form school and tried to start the pc, it wouldn't start. Nothing did nothing. Only thing that was showing life was the 2 power LED's on the GPU, but they are on all the time anyways... So I disassembled the whole PC and put the CPU and RAM on the mobo and connected my SSD and PSU. Connected the two pins wich stars the PC, but still nothing happened. Disconnected psu and connected the green and black wires, and it turned on instantly when turned on. Connected the PSU back and tried to start, but still nothing. Took my old PSU, tested that it works and connected it to the mobo, still nothing...

I think the mobo is broken, but could you guys give me any advice?

Thank you for every reply!

Hmm, sounds about right. You could also always try that PSU in another system if possible.

 

If your mobo has voltage ports on it get that voltmeter out! If not it may be your mobo or your psu.

Maybe the mobo.

Take the mobo out, strip it bare, use 1 stick of RAM, the processor and cooler (ofc) and PSU, fire it up, and see what happens, if you get a post your a step closer.

If not take out the CMOS chip and then reinstall it (Use a knife, it wont damage it) this will reset the entire bios you will loose OC but it will tell you if it was caused by the OC (if it posts)

if you get a post read out and it all works, then try the GPU, if you again get post, install the other stick of RAM, again if post, put the rest of the PC together with the SSD etc, see if you can boot into the OS.

Try get a cheap voltage meter, even if its not the PSU, its there for later on, get a rail checker also, if one of your rails is defective you need to swap PSU.

hope it helps!

Some more info. Tested the PSU on a old PC, everything worked perfectly, so I am pretty sure it's not the PSU.

I do have a multimeter, because I'm an Electric and Telecommunication engineer student (or at least I think that's how it's written...)

The motherboard does not have voltage checkpoints, as far as I can tell...

Contacted the Company I bought it from and now waiting for them to reply, and send me an RMA paper.

Sounds like the motherboard if nothing happens at all.  I haven't ever had a problem with a gigabyte board.  Sorry to see that yours might be a lemon.

I've heard very good things about gigabyte boards and this one worked very well until today :/ It might be just a malfunctioning capasitor etc. somewhere... :/

 

I really hope that I will get a new board from RMA...

Btw. I had my i5 clocked at 4.2 GHz, does overclocking void motherboard warranty?

I don't think so.  The warranty should still be good even if you overclock.

Thanks for the help, all of you. I should get the answer for my RMA tomorrow :)