PC not powering up, CPU fans spin without 4pin connected.

[poolieladhd]

Hello community,

So after a day or two trying to figure this out i have come to the community that i think i can get the answer from.
So after building my new PC i powered it up and all seemed fine after about 5 minutes PC shuts off and fails to reboot, i tried looking around PC making sure all connections were correct and they were (Not my first PC build). So after scratching my head i went to the breadboard technique.

So with the motherboard on the box it came in and with ONLY the CPU and HSU plugged in i also plugged in CPU fan and the plugged in the 24 pin connecter for the power. I cross bridge the POWER SW pins and voila cpu fans spin up,but stop as i dont have the 4 pin cpu power connected, so i switch off power and connect it....switch PC back on and go to power up and nothing at all.

I have tested another PSU and get same result.
Ramm, GFX card, HDD and SSDs work in my other build.

I was thinking this is a motherboard issue but i am unsure, if it was a CPU issue i could try the CPU in my other build BUT its a £2500 build and dont want to break anything on that.

Help me!

Thanks

Craig.

 

[poolieladhd]

Sorry forgot my specs,

I5 4690K

GTX 1060 3GB

MSI H81I Motherboard

Corsair vs 650 PSU

8GB Corsair vengeance (1600MHz)

 

[Kasper Jorgensen]

Which other PSU have you tested because the one you have is a cheap crap PSU.

 

[poolieladhd]

Sorry forgot my specs,

I5 4690K

GTX 1060 3GB

MSI H81I Motherboard

Corsair vs 650 PSU

8GB Corsair vengeance (1600MHz)

Which other PSU have you tested because the one you have is a cheap crap PSU.

Corsair AX 860W Fully Modular 80+ Platinum Power Supply

 

[Kasper Jorgensen]

Okay that is a good quality one.
You will not break anything by trying your GPU in another mobo. Also get memtest86 and test your ram.

 

[poolieladhd]

I will do that, Its the CPU i am wanting to know about. Will the CPU damage my working system if i try it to see if it is infact the CPU that is causing the no post.

 

[poolieladhd]

Okay that is a good quality one.
You will not break anything by trying your GPU in another mobo. Also get memtest86 and test your ram.

I will do that, Its the CPU i am wanting to know about. Will the CPU damage my working system if i try it to see if it is infact the CPU that is causing the no post.

 

[mironso]

Look here: CPU support.
Is your cpu Core i5 Haswell Refresh??
If not then it is not supported, so that is the reason your rig is not starting.

 

[poolieladhd]

Look here: CPU support.
Is your cpu Core i5 Haswell Refresh??
If not then it is not supported, so that is the reason your rig is not starting.

I am not sure, looking at the CPU it is a i5 4690K (Malay)

 

[poolieladhd]

Look here: CPU support.
Is your cpu Core i5 Haswell Refresh??
If not then it is not supported, so that is the reason your rig is not starting.

Also the PC has booted once for 5 mins i got to the BIOS and then it stopped would i get that far with the issue you have suggested?

 

[Kasper Jorgensen]

No it will not damage your system.

 

[poolieladhd]

No it will not damage your system.

Ok so i put in my working CPU and tried and still nothing, am i safe to assume now that it is indeed the motherboard that is faulty?

 

[Kasper Jorgensen]

If you have checked ram with memtest86 for at least 8 passes then it seems most likely it is motherboard.

 

[poolieladhd]

If you have checked ram with memtest86 for at least 8 passes then it seems most likely it is motherboard.

I have ram unplugged while testing to see if pc turns on but i will still test it

 

[Kasper Jorgensen]

Okay, then it seems like a faulty mobo.