Computer turns on for 0.5 seconds then shuts down

JohnnyPlsk · Dec 4, 2013

So, I've changed motherboard, CPU and RAM on my computer and now whenever I try to turn it on, the fans spin a bit then shut down (after about 0.5 secs). I checked all the cables about 100 times but the problem still persists.

Any ideas?

NormH · Dec 4, 2013

psu or the parts are not recognized. try the old parts if it powers up then the parts are the issue. also if the new parts need more power and the psu is too weak that could be it also.

dextermat · Dec 4, 2013

Hi..
giving us at least the details of the cpu, motherboard and ram would of been more than appreciated (it's kind of important)

Did you plug in the 4 or 8 pin properly (close to the cpu)
What wattage it your psu? Is it sufficient for your build ?
Try booting without any memory, do you get beeps ?

JohnnyPlsk · Dec 4, 2013

Power supply: CoreXStream 500W
CPU: Intel i5 4670
Motherboard: Asrock Z87 Pro3
RAM: Kingston HyperX Blu 8Gb

I plugged the 8pin properly, and I didn't get any beeps anywhere (don't know where are they supposed to come from anyway)

NormH · Dec 4, 2013

if integrated graphics you are fine with that psu if dedicated card you want atleast 600w. could be the issue

JohnnyPlsk · Dec 4, 2013

NormH :

I use nVidia GT8800 card. I just tried removing it and then power it up, however it still wouldn't boot (it actually shut down even faster and more quiet).

NormH · Dec 4, 2013

hmm no beeps? or warning displays? may be faulty parts. mobo or cpu would be my guess but it will need to be professionally tested. or if the old parts and new are compatible change one at a time til it works then return/replace the culprit.

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Computer turns on for 0.5 seconds then shuts down

JohnnyPlsk

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dextermat

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JohnnyPlsk

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JohnnyPlsk

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NormH

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