Help troubleshooting non functional pc.

[bradleyusm]

I'll try to list what I've experienced and done so far. 

 

Order of events:

SSD broke(unrecoverable)

replacement hard drive worked for 1day and broke(recoverable)

computer now fails to boot to splash screen. 

 

Already tried:

reset CMOS/replaced CMOS batt

pulling all ram and video card and testing each one at a time. 

Tried two different PSUs

tried onboard GPU and a different ext GPU

reseated CPU 

 

Currently the computer powers the fans and spins the HDD but then powers back off and tries to boot again(endless loop). It will occasionally show the beginnings of the bios but then freeze. 

 

I assume it is either the MB or the CPU. If possible I'd like to try the motherboard only but I'm concerned it may be the CPU or both CPU and MB. 

 

SYSTEM:

3570k @ 4.4(h110 cooler)

Gigabyte z77-something or other Matx board.(sorry I don't have it in front of me)

16GB Crucial RAM 4x4GB

gigabyte 780

rosewill 750w 80+gold psu

fractal arc midi r2 

random hard drive(it works)

 

[kosamchetoo]

By the symptoms It could be either the CPU or Motherboard but could also be the hard drive. Can you enter the BIOS?

[bradleyusm]

Unfortunately no I can not enter the BIOS. Could a failing motherboard cause my SSD and HDD to fail like that?

[Mccapital]

Have you tried a different hard drive

 

[kosamchetoo]

It could be either the CPU, the Motherboard or the Hard Drive. I have heard people that can't enter the BIOS because of a bad hard drive. I don't think a failing motherboard can harm a hard drive.

[SonoDanshi]

I'd suggest pulling everything out of the case and building it again to remove that as a possibility. I've had grounding/shorting issues from cheap cases before.

[bradleyusm]

I have tried multiple hard drives. My original issue was my SSD failing so I tried that first. I also completely pulled the PSU and replaced it with another one. I believe I have eliminated the HDD(hopefully). 

 

My next question is, do you think it's worth buying another z77 MB for ~$100. Risking that the CPU was the problem all along. 

 

Short question. Is it more likely to be the CPU or the MB?