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Computer turns on, only to turn off after about 2 seconds.

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March 11, 2013 3:50:24 AM

Basically whats in the thread title, when I turn the computer on it shuts itself of immediately after about two seconds, in this time the fans start up and the lights on the pwoer switch go on, but that's the extent of it. Once it's turned itself off and the fans are nearly done spinning it'll try to reboot itself but then switch off immediately.

I've had my PSU checked and been told that it is working fine, I've also taken all the components out of the computer and run it with just the PSU, motherboard and CPU and this still doesn't work.

This has lead me to believe that it is a motherboard or CPU issue.

Was just hoping for some advice on how to identify which of the two has stopped working on me. and/or some suggestions for new gear.

Specs:
7970 Gigabyte vid card
g.skill 6g ddr3-1600
OCZ 700w psu
ASUS p6t se motherboard
i7 - 900 series processor

Without being able to access the computer this is all the details I can get on my specs.

side note; after taking the heat sink off, I have noticed that the compound which separates the processor and the heat sink looks fairly worn.
March 11, 2013 4:03:48 AM

siwel16 said:
Basically whats in the thread title, when I turn the computer on it shuts itself of immediately after about two seconds, in this time the fans start up and the lights on the pwoer switch go on, but that's the extent of it. Once it's turned itself off and the fans are nearly done spinning it'll try to reboot itself but then switch off immediately.

I've had my PSU checked and been told that it is working fine, I've also taken all the components out of the computer and run it with just the PSU, motherboard and CPU and this still doesn't work.

This has lead me to believe that it is a motherboard or CPU issue.

Was just hoping for some advice on how to identify which of the two has stopped working on me. and/or some suggestions for new gear.

Specs:
7970 Gigabyte vid card
g.skill 6g ddr3-1600
OCZ 700w psu
ASUS p6t se motherboard
i7 - 900 series processor

Without being able to access the computer this is all the details I can get on my specs.

side note; after taking the heat sink off, I have noticed that the compound which separates the processor and the heat sink looks fairly worn.


Sounds like a possible connection problem, does your system speaker beep? Try re-seating everything like all your power cords off your mobo. I've had something similair happen to me, after I re-seated it all the system booted up.
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a b B Homebuilt system
a c 87 V Motherboard
March 11, 2013 4:10:03 AM

Highest chances of the culprit, like you said, mobo or cpu.

When you physically examine your mobo can you see any capacitors swelling, bulging?
Next, that 'side note' of yours sounds good. You'd be lucky if it is just an over heating issue on the CPU. Try and re-seat the CPU with some new thermal paste and hope for the best!

As rue above asks, any speaker beeps? If not, do you have speakers in the case that you haven't hooked up? That would help a LOT.

You haven't OCd anything right?
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March 11, 2013 4:27:29 AM

jimthenagual said:
Highest chances of the culprit, like you said, mobo or cpu.

When you physically examine your mobo can you see any capacitors swelling, bulging?
Next, that 'side note' of yours sounds good. You'd be lucky if it is just an over heating issue on the CPU. Try and re-seat the CPU with some new thermal paste and hope for the best!

As rue above asks, any speaker beeps? If not, do you have speakers in the case that you haven't hooked up? That would help a LOT.

You haven't OCd anything right?



Can confirm that I haven't OC'd anything.

Haven't thought to look for capacitor swelling or bulging will do now.

Also with checking the motherboard, I've heard it's possible for the motherboard to run to BIOS with just the PSU and no CPU connected? I believe this would confirm whether or not its the motherboard or CPU?

Can confirm no beeps whatsoever and I'm fairly positive that the case has speakers hooked up.

I'll try re-seating everything now and get back to you.

Also with thermal paste is it something I could acquire relatively easily / I'm worried about applying to much, does it just have to be a thin layer covering the circular sink conductor bit and the square cage for the processor?
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March 11, 2013 4:35:45 AM

if it was the cpu heating problem it would still start until it over heated, you'd hear a screech from your system speakers and the system would shut down.
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March 11, 2013 4:42:45 AM

siwel16 said:
Can confirm that I haven't OC'd anything.

Haven't thought to look for capacitor swelling or bulging will do now.

Also with checking the motherboard, I've heard it's possible for the motherboard to run to BIOS with just the PSU and no CPU connected? I believe this would confirm whether or not its the motherboard or CPU?

Can confirm no beeps whatsoever and I'm fairly positive that the case has speakers hooked up.

I'll try re-seating everything now and get back to you.

Also with thermal paste is it something I could acquire relatively easily / I'm worried about applying to much, does it just have to be a thin layer covering the circular sink conductor bit and the square cage for the processor?


just put the size of a grain of rice and press down on the heatsink abit., or you can do the credit card method. Thermal paste is easy to get if you have a computer store there, if not you'd have to order it.

http://www.youtube.com/watch?v=EyXLu1Ms-q4
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a c 86 V Motherboard
March 11, 2013 10:51:00 AM

Had this with a GB board, disconnect mains, remove the cmos battery for a couple of hours and then try again, just fired up and hasn't stopped, corrupt bios.
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