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my newly build pc won't power up properly. after 1 second it turns off again

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December 28, 2013 3:28:18 PM

i hope someone can help me with this problem. i have searched the web but could not find anything related to my situation.

my newly build pc won't power up properly. when i hit the power switch the pc gets power for 1 second. after 5 seconds it will automaticly power on again for 1 second. i know it is not the psu because i tested another one of which i know it works. i also have unplugged everything that is not needed to boot. also the fan connector is connected so that can't be it either. the capacitors on the motherboard are also comepletely clean and undamaged.

i would like to thank everyone in advance :) 

update : if i don't connect the cpu power then it will stay powered on but obviously won't boot.
December 28, 2013 3:44:44 PM

Ok so you press the power switch once and the computer keeps trying to cycle on?

Or are you saying after waiting 5 secs you can try again?

Try going through this checklist http://www.tomshardware.com/forum/261145-31-perform-ste...

I would also think about disconnecting the power switch from the motherboard and just jumping the connection to see if you may have a bad power switch,
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December 28, 2013 4:10:57 PM

jnkweaver said:
Ok so you press the power switch once and the computer keeps trying to cycle on?

Or are you saying after waiting 5 secs you can try again?

Try going through this checklist http://www.tomshardware.com/forum/261145-31-perform-ste...

I would also think about disconnecting the power switch from the motherboard and just jumping the connection to see if you may have a bad power switch,


it will restart automaticly and won't stop until i cut the power. i have also tried shorting the pins with a screwdriver but that doesn't help
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December 28, 2013 4:14:08 PM

Gonna need some specs. Especially the psu.
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December 29, 2013 6:41:19 AM

jnkweaver said:
Gonna need some specs. Especially the psu.


it's a simple build for simple tasks so no expensive parts.
cpu: celeron 1620
motherboard: asrock h61m-vs
ram: 2 gb kingston low profile
hdd:none i use ubuntu from a usb
optical:none
psu: some cheap chinese thing. i know this psu works fine because i have used this on pc's with more load. to be sure i have also used a good zalman psu that is working fine inside another pc, but this doesn't solve the problem. so i don't think the psu is the problem.
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December 29, 2013 12:41:30 PM

So no gpu just the apu? Are you sure you have all the connections correct?
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December 29, 2013 12:44:03 PM

jnkweaver said:
So no gpu just the apu? Are you sure you have all the connections correct?


it's not an apu but yes i'm using the integrated graphics. since im only using usb devices the only connections are the 4 and 24 pin power connectors. right now the motherboard isn't even in a case so no front panel headers etc.
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December 29, 2013 12:54:54 PM

And your sure the motherboard isn't touching anything that is shorting it out?
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December 29, 2013 12:56:14 PM

jnkweaver said:
And your sure the motherboard isn't touching anything that is shorting it out?


i placed it on different surfaces like wood paper and cardboard
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Best solution

December 29, 2013 12:59:10 PM

Well then I would say you have a bad motherboard. Specifically it sounds like a short in the reset switch. Since you said it wasn't connected to the case headers that points to the mb.
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December 29, 2013 1:37:56 PM

jnkweaver said:
Well then I would say you have a bad motherboard. Specifically it sounds like a short in the reset switch. Since you said it wasn't connected to the case headers that points to the mb.


well that sucks :(  gues i have to get a new motherboard
thanks for the help
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