Power down issue less than a seconds after power up.

[ChipButty]

Hi all,

I'm having an issue with a build right now, this is actually my first time trying to build a full PC from scratch and this is the first problem I've hit.

I'm stumped so hopefully you guys can give me a help in hand.


System

Motherboard - P8H67M_LE

RAM - 2x 4gb Corsair Vengeance low profile DDR3 ram

CPU - Intel® Core™ i3-2100 Processor (3M Cache, 3.10 GHz)

PSU - Win Power 634 wat PSU


I've not connected a HDD or GPU or any other none essentials as of yet until I know this system can power up.

So the actual problem, when I press the power button on all fans/LEDs seem to power up for no more than a second, then everything just powers down.

I've tried keeping my finger on the power button and the same thing happens, the confusing part of all this though, is that the light on the motherboard is on as long as the power is on and connected which again is somewhat confusing to me.

I've tried using 1 stick of ram at a time in each slot with both sticks and the same problem occurs. I cannot see this being some kind of thermal shutdown unless some sensor somewhere is playing up due to how long the system is powered for.

None of these parts are brand new, everything is second hand which will probably make the diagnosis harder.

I'm known for missing simple problems after spending hours on other more complicated stuff so please feel free to throw the most obvious of things I may of missed my way because it is very possible I've just bypassed them completely.

Thank you all in advance,

Nathan.

 

[AMD Radeon]

the problem can be anything

1) graphic card or any pci pheriperal. please remove them
2) your PSU looks suspicious. try using your friend's PSU to test your setup. any tested working PSU will do. or you can use trusted antec, corsair, xfx PSU
Win Power 634 wat PSU is not a reputable brand which means it has likely more chance to fail

 

[ChipButty]

There are no GPU's or any other devices inserted to the PCI slots at all, just one stick of memory and the CPU and fans.

I've just tried another PSU which I know works and the same problem persists.

Any ideas?

 

[scout_03]

did you test the system outside the case and did you install the standoff between the case and motherboard ?

 

[ChipButty]

Yes the standoffs are installed and I've tried to power up with the mobo on cardboard also.

 

[quilciri]

Are there any standoffs in the case that are touching the motherboard in a place where there *isn't* a screwhole?

 

[orthokid]

I had the same problem with one of my builds. Is the CPU generation compatable with the motherboard?

 

[orthokid]

I checked the motherboard and CPU, Motherboard support 3rd generation CPUs and the CPU is 2nd generation. I believe this is your problem.

 

[quilciri]

I checked the motherboard and CPU, Motherboard support 3rd generation CPUs and the CPU is 2nd generation. I believe this is your problem.

Any motherboard that supports an ivy bridge chip will also support sandy.

 

[orthokid]

Any motherboard that supports an ivy bridge chip will also support sandy.

Oh, ok. I didnt know that.

 

[scout_03]

when you have the psu on power does the light on the board is on without pressing the power button ?

 

[ChipButty]

Are there any standoffs in the case that are touching the motherboard in a place where there *isn't* a screwhole?

Nope, there are only 6 standoffs on the Micro ATX those 6 pieces with the nut a screw are the only things touching the mobo, the mobo plate is currently sat on a piece of cardboard.

 

[ChipButty]

when you have the psu on power does the light on the board is on without pressing the power button ?

Yes on both PSU's the green light is always on, when I press the power button a red light does briefly come on next to the main power cable connected to the mobo before powering down.

No idea what relevance this had though.

 

[ChipButty]

Sigh I'm an idiot, I cannot believe I did not have power going to the CPU.

How I missed this is quite worrying...really...

 

[scout_03]

it happens to all of us making a mistake sometimes.

 

[quilciri]

We screwed up troubleshooting it as well, we should have asked you if the 4/8 pin CPU cable was seated properly right off the bat >.<.

glad you've got it working!