PC keeps shutting down 4-5 seconds after power up (even when booted outside the case)

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shnndr

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Oct 16, 2014
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Hello!

I really need some advice with this. I've built a custom PC couple weeks ago and just recently when I tried to power up, it shut itself down after a few seconds. Fans inside the case work (GPU, CPU and case fan) before it shuts down.

I've tried the following:
- boot only with CPU installed (even tried doing it outside the case), and with various levels of components installed
- tested voltages on power supply with a multimeter (all were in normal intervals)
- flash BIOS by removing battery for 1 minute
- check power button cable for problems
- rewire everything

I have tried everything I am capable of. Please, can you guide me towards which component may cause this issue, because I really don't know what else to do... Thank you!

Build:
MB: Asus M5A97 Evo R2.0
CPU: AMD FX 8350
GPU: Sapphire ATI Radeon R9 280
PS: Corsair CX600M (600W)
RAM: Corsair Vengeance 2x4GB CMZ8GX3M2A1600C9
SSD: Samsung 840 EVO 250Gb
Case: Antec VSK-4000E
DVD-RW: Samsung
OS: Windows 8.1
Monitor: BenQ VW2245Z 21.5 inch (through DVI)
Wireless card: TP-Link TL-WDN4800

 
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shnndr

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Oct 16, 2014
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Thank you for your advice, but unfortunately, I have already tried that. I even tried to boot with the motherboard outside the case, by bridging the 2 pins with a screw driver. Whatever it is, it isn't a simple problem.
 
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Markkk

Markkk

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Jan 2, 2012
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Any Beeps? (is pc speaker connected?)

Refit CPU if you have not done so already

You have installed a CPU cooler? (and its on correctly?)

The Typical Faults of a PC turns itself off after a few seconds is usually / Or Fans Spin then stop screen does not get turned on;
- Motherboard
- CPU
- PSU

There are other occasions when this can happen (faulty switches, bad power connections, ground issue) but you seem to have covered this.
 
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shnndr

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Oct 16, 2014
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Thanks! Can I rule out the power supply, as I've tested each one of the wires on the 24 pin connector with a multimeter and the voltages were all right?

I'd also like to mention that when I boot the PC with only the 24 pin connector (so without the smaller motherboard connector), the PC doesn't shut down anymore, but it doesn't seem to respond to anything though (the CPU led stays lit). Don't know if this means anything though...

I removed the CPU now and today I'll try to buy a thermal paste and some alcohol to reapply. If I am able, I will try to buy a post test card, maybe that will help narrow down the possible fault.

Re the speaker, do you mean a normal speaker connected to the motherboard audio out? Because inside my case I do not seem to have a speaker for boot signals, even though I have connected the audio wire to the motherboard.
 
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Markkk

Markkk

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Some motherboards have a small black round speaker onboard - you will know as your will hear a single short beep whenever you turn your pc on.
Otherwise you need to connect the 2 wire 4 pin speaker from your case

The beeps tell you what error or if all is ok

1 short beep = all ok
0 beeps or any other series of beeps means an error of some kind - refer manual

If you have a local PC merchant that sells PC parts they may have a diagnostic Card (you can also buy them) they simply plug them into a spare PCI socket and it report a code...

Those extra 4/8 pin power sockets are Required for your CPU http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4 http://superuser.com/questions/432234/is-the-4-pin-psu-connector-required-trying-to-connect-a-psu-to-a-mini-case
 
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Markkk

Markkk

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As for speaker http://www.google.co.nz/imgres?imgurl=http%3A%2F%2Fwww.custom-build-computers.com%2Fimage-files%2Fspeakers-to-a-motherboard.jpg&imgrefurl=http%3A%2F%2Fwww.custom-build-computers.com%2FConnect-PC-Internal-Speakers.html&h=319&w=425&tbnid=vXjwwJiyZK-wpM%3A&zoom=1&docid=5d1Ma5NLAN47IM&ei=o3pBVOTLEuXvmAXKh4GYCw&tbm=isch&ved=0CB0QMygBMAE&iact=rc&uact=3&dur=1097&page=1&start=0&ndsp=25
http://www.google.co.nz/imgres?imgurl=http%3A%2F%2Fimg.bhs4.com%2F8d%2F2%2F8d2064aaa80504b2674052686523f157d1eed2bd_large.jpg&imgrefurl=http%3A%2F%2Fwww.brighthub.com%2Fcomputing%2Fhardware%2Farticles%2F67186.aspx&h=600&w=600&tbnid=q_diMeCcMRMZSM%3A&zoom=1&docid=wqpvh9XHiejwAM&ei=o3pBVOTLEuXvmAXKh4GYCw&tbm=isch&ved=0CBwQMygAMAA&iact=rc&uact=3&dur=3375&page=1&start=0&ndsp=25

Hopefully you have 1 onboard or you can get one cheap
 
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shnndr

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What I ended up doing is I ordered another PSU, one that is specifically designed for performance. If that will not work, I will return it and order a motherboard instead, haha. Not nice of me, but what can I do? I also ordered some thermal paste for the processor. They will arrive next Tuesday. I am looking forward to see what they will do. Until then, thanks for all your help!
 
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Markkk

Markkk

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Remember 1 drop of thermal paste (typical of how you imagine a drop of water)

Refer http://www.hardwaresecrets.com/printpage/What-is-the-Best-Way-to-Apply-Thermal-Grease-Part-2/1392

There are so many methods and cool sounding videos out there but end of day too little is an issue - too much gets messy
Whatever floats your boat and sounds convincing is what people go for but have they actually fully tested the methods - most have not

End of day the easiest method still proves to be the most easy and reliable method for current CPU and Heat-sinks.
(If it aint broke why try fix it?)
 
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shnndr

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Oct 16, 2014
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Cheers for that!
 
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