Pc starts for 5 seconds than turns off

[Khye]

Today I bought brand new parts for my pc
- msi gtx 1050 graphics card
- corsair cx750m 750w power supply
- wd blue 2tb hdd
- hyperx fury 240gb ssd
- cooler master n300 case
To go with my older parts
- Asrock z77 extreme6 motherboard
- Intel i5 3.2ghz processor
- 2x g.skill 4gb ram

I assembled the rig myself and now it just turns on for exactly 5 seconds and then turns off. At first I thought the front power button was wired wrong, as I can't turn it on from the front power button, only the switch at the back from the psu. I'm also thinking that my case is missing a cable as I've seen people talking about a 4-pin connector and I do not have any 4-pins in my case.

I've looked through countless forums and YouTube videos and have tried the following:
- removing and replacing ram
- removing and replacing cmos battery
- checking all cables are secure

It also would seems like there is an issue with my psu but it's brand new so I doubt it is faulty

Thanks for your help

 

[Paul NZ]

Did you connect the ATX12v, the cpu fan and 24 pin connector?? All 3 have to be connected

And what I5 CPU have you got?

 

[Khye]

Yes all 3 are connected, and I'm not sure which i5 I have more than Intel

 

[Khye]

No sorry, the atx12v is nowhere to be seen. I believe that is the 4-pin I was talking about being missing

 

[Paul NZ]

It needs that. Otherwise it wont boot. It's either 4 pin or 8 pin

Is this a modular?? The cables should have come with it

 

[Khye]

All the other cables came with it yes. To clarify, does the atx12v usually come with the case or the psu? Because I believe I see said cable attached to my old (worn-out) psu and not my old tower case

 

[Paul NZ]

It should come with the PSU. If it's not a modular PSU, then it's one of the cables coming out of the PSU itself

If it doesnt have it you'll have to buy another PSU thats got it

Because it wont turn on or post without it

 

[Khye]

Thanks for your help

 

[Paul NZ]

No probs

 

[Khye]

Sorry to start again, but the atx12v is plugged in and the same problem is occurring

 

[Paul NZ]

Find out what the cpu is. Because if the bios thats on the mobo doesnt support it without a BIOS update, it wont do anything either

 

[Khye]

The cpu and mobo have previously run together with no issues for 3+ years. I've also had a technician out recently (before I upgraded some of my parts) and he said there were no issues with the mobo or cpu

 

[Paul NZ]

Well there's something wrong now. If the cables have been connected, it's either the ram, the CPU or the mobo

Is there a speaker on the mobo header?? So you can hear it beep?

 

[jrrdmchls]

The cpu and mobo have previously run together with no issues for 3+ years. I've also had a technician out recently (before I upgraded some of my parts) and he said there were no issues with the mobo or cpu

What exactly did you upgrade?

You previously stated :

"The cpu and mobo have previously run together with no issues for 3+ years. I've also had a technician out recently (before I upgraded some of my parts) and he said there were no issues with the mobo or cpu"

and then;

Today I bought brand new parts for my pc
- msi gtx 1050 graphics card
- corsair cx750m 750w power supply
- wd blue 2tb hdd
- hyperx fury 240gb ssd
- cooler master n300 case
To go with my older parts
- Asrock z77 extreme6 motherboard
- Intel i5 3.2ghz processor
- 2x g.skill 4gb ram

are they new or 3 years old?

UPDATE: Never mind I didn't read close enought sorry lol

 

[Khye]

It says what I upgraded in my first post;
- msi gtx 1050 graphics card
- corsair cx750m 750w power supply
- wd blue 2tb hdd
- hyperx fury 240gb ssd
- cooler master n300 case

The older parts are
- Asrock z77 extreme6 motherboard
- Intel i5 3.2ghz processor
- 2x g.skill 4gb ram

 

[jrrdmchls]

It says what I upgraded in my first post;
- msi gtx 1050 graphics card
- corsair cx750m 750w power supply
- wd blue 2tb hdd
- hyperx fury 240gb ssd
- cooler master n300 case

Yah sorry reading is hard HAHA!

 

[Khye]

@paul nz, no there is no speaker, all I see is lights when I turn it on

 

[Paul NZ]

If the CPU has integrated gfx remove the GPU. See if something works with the onboard video

 

[jrrdmchls]

You connected the 6pin power to the Graphics card?

 

[Khye]

I tried running without gpu and same issue occurs

 

[jwcrellin]

Improperly seated ram will cause a 5 sec boot loop.

 

[Khye]

There is no plug on the gpu for any cable. I was co fused about this at first as my last 2 gpus have needed cables, but I've checked up and down this msi gtx1050 and there is no port to be found

 

[jrrdmchls]

I tried running without gpu and same issue occurs

When you installed the board into the new case. Did you make sure to use the standoffs and make sure that each screw hole has a standoff?

 

[Khye]

Have checked the ram multiple times in every slot

 

[jwcrellin]

Try with one dimm only in the slot farthest from the cpu.