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Computer not turning on, maybe dead CPU

Last response: in Components
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October 29, 2011 9:49:46 AM

My Specs:

CPU: i7 2600
MOBO: GA-Z68XP-UD3
RAM: G. SKILLS 8GB @ 1600
GPU: XFX 6950 1GB
HD: 1TB WD
PSU: CoolerMaster RS-650-ACAA-E3 GX SERIES 80+ 0650W


My computer turns on for 1/2 a second then turns off, disconnected cables etc, made sure they were all plugged in to no avail. I have not been able to get any results and have not conducted any tests. Please let me know what you think. I'm suspecting that I bought an underkill PSU, if that's the problem, no worries i'll claim on warranty then exchange for something 50-100W more.
October 29, 2011 9:50:32 AM

hiimnickwhoareu said:
My Specs:

CPU: i7 2600
MOBO: GA-Z68XP-UD3
RAM: G. SKILLS 8GB @ 1600
GPU: XFX 6950 1GB
HD: 1TB WD
PSU: CoolerMaster RS-650-ACAA-E3 GX SERIES 80+ 0650W


My computer turns on for 1/2 a second then turns off, disconnected cables etc, made sure they were all plugged in to no avail. I have not been able to get any results and have not conducted any tests. Please let me know what you think. I'm suspecting that I bought an underkill PSU, if that's the problem, no worries i'll claim on warranty then exchange for something 50-100W more.


* MISTAKE IN TITLE, I MEANT PSU
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a b à CPUs
October 29, 2011 10:11:10 AM

first of all try with different power cable often this will the problem.
2:remove psu cable from mobo and check if any "pin" were broken
3:have you put paste on your cpu.
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Related resources
a c 85 ) Power supply
a c 86 à CPUs
October 29, 2011 10:14:54 AM

PSU should be enough. Have you double checked everything?
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October 29, 2011 10:19:56 AM

pro-gamer said:
first of all try with different power cable often this will the problem.
2:remove psu cable from mobo and check if any "pin" were broken
3:have you put paste on your cpu.


1. I'll do it now.
2. "
3. No, i'm using a stock fan and haven't oced, didn't think i'd need it.
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October 29, 2011 10:45:57 AM

Correct. Intel stock heat sinks come preapplied with thermal compound.

Did you install your motherboard standoffs? The computer quickly turning off after switching the computer on often means that something is shorting out somewhere. If you did not install your motherboard standoffs its possible that the pins on the back of the motherboard are connecting to the metal motherboard tray and shorting out. If you don't know the motherboard standoffs are long washer type things that screw into case before the motherboard is installed.

If you have installed the motherboard standoffs I'd suggest starting to breadboard your system. This is done by getting the motherboard out of the case and plugging it up with only a CPU, then adding RAM, then a GPU, and so on ...
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a b ) Power supply
a b à CPUs
October 29, 2011 10:49:26 AM

and........ while the motherboard is out reseat the heat sink and fan. You may have not seated it flush on the processor. Best to install it with mobo out of case and make sure the pins "snap" into place behind the mobo............ and install in a criss cross patter not in a clockwise fashion...................... and when I had processors go......... it's as you described. push button and nothing...... not saying yet that that is the problem.
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October 29, 2011 11:07:12 AM

1. Still doesn't work using monitor cable.
2. None appear to be broken.
3. Using stock fan w/out ocing, no need for paste.
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a c 144 ) Power supply
a c 172 à CPUs
October 29, 2011 11:07:51 AM

Assuming your cooler is properly installed, your problem probably is not your CPU. If you do have a hardware problem, my first guess would be the PSU - not the capacity, but the quality.

First, review this for any obvious mistakes:
http://www.tomshardware.com/forum/274745-31-step-step-g...

Then go through this thread (do everything, we spent a lot of time on this - you should be able to find the problem):
http://www.tomshardware.com/forum/261145-31-perform-ste...
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October 29, 2011 11:20:22 AM

Oh, I forgot to mention the following. This is why I suggest the PSU might be dead, I built my PC 4 weeks ago, I haven't had a problem until now, I was playing a game that wasn't exactly graphically demanding for my build, but still, not too bad (Darksiders), whilst playing, the PC just abruptly turned off.

In regards to the links.

1. I checked through, I didn't make mistakes (surprising for me)
2. The thread mentions the obvious, the PSU is dead, but is there anyway to test this without going to the pain of unplugging everything and testing each individual component?
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October 29, 2011 11:29:13 AM

Not conclusively ... But if the PSU fails this test then you won't have to pull everything apart.

http://www.youtube.com/watch?v=5FWXgQSokF4

If you have another PSU you could use that to test your parts!!

++ Another possibility. The PSU might be pumping too much voltage to the motherboard. This would cause the computer to cut out as the motherboard would switch off to protect against power surges. If you have a multimeter you can check your voltages.
http://www.hardwareheaven.com/guides/testingPSU/ ++ This guide looks relatively well detailed. I however have not used it as I have not needed to.
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October 29, 2011 11:45:58 AM

That test requires you to disconnect everything but a case fan. This should be painful. I'll do it in the morning when i'm not on the cusp of sleep.
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