Pc wont boot up?

[Section{8}]

Hi all

After finding out i couldnt sleep,i jumped up hit the power button on my gaming rig,it fires up for at the MOST a second,just enough time to give life to all the L.E.Ds and fans,then,well thats it.

I have to reach around the back,flip the switch on the powersupply to off for a few seconds for it to only repeat what i stated above.

I had zero probs with the rig,No warning signs,nothing outa the norm at all,just Po0f,it dont want to boot up.

Ive seen the TGN community give alot of helpfull advice so this is why i turn to you guys.

The gaming pc specs are

eVGA nf680i sli mobo
duo core 6300
2 gigs ddr2
8800 GTX 768
600 watt Psu
os=XP pro.
^ thats just a simple run down of the specs
Thanks to all in advance for any help.:salute:

[Trevortt]

So when you hit the power button all you get is a few lights and then it goes off?

Can you try the rig with a different PSU?

[Section{8}]

So when you hit the power button all you get is a few lights and then it goes off?

Can you try the rig with a different PSU?

Yup,The l e d lights turn on,fans kick in,then thats all i get,But there is a blue led light on the mobo that stays lit after every thing stops.

No i dont have a psu that will work in the gaming rig.
Thanks for the fast reply :)

[=98=]

You need to try jumpstarting the computer from another PSU. This may mean putting another computer next to it and transferring the ATX plugs.

Secondly, are there any beeps or error codes displayed. These will help immensely as they help narrow down errors provided by the BIOS.

It could also be your motherboard fried by something like a power surge, so try booting up a different computer using that PSU.

[Section{8}]

You need to try jumpstarting the computer from another PSU. This may mean putting another computer next to it and transferring the ATX plugs.

Secondly, are there any beeps or error codes displayed. These will help immensely as they help narrow down errors provided by the BIOS.

It could also be your motherboard fried by something like a power surge, so try booting up a different computer using that PSU.

Thanks alex,ill have to try this.
No there is not any error codes displayed or any beeps,it dont even run long enough for the LED code On the mobo to be displayed,It realy is like a split second that it starts,you see lights hear the fans kick in then its done.

:salute: Thanks again guys

[=98=]

Sounds like a dead mobo or PSU. Try what i suggested. That is your only hope of finding what is wrong.

Pray that your parts are still in warranty.

[Section{8}]

Sounds like a dead mobo or PSU. Try what i suggested. That is your only hope of finding what is wrong.

Pray that your parts are still in warranty.

Again thank you :)

Im not sure if i have any warranties still ill look into that later today.

Man this sure sucks,question,besides a power surge,would i have noticed any thing? i have a small desk lamp pluged into the same power strip as the pc and i never seen any odd flickers or any thing?(ima nub i know :))

Thanks alex for your advice and time when i find out whats wrong ill post back.

As always I :salute: TGN :)

[=98=]

No, power surges are often caused by lightening strikes or short circuits. If my memory serves me right, fuses are meant to prevent this, but it can still happen. That's why i always use a plug block with an anti-surge element to it.

I also believe there are parts in the PSU (is it the MOSFET?) that are meant to regulate the flow of current, but how this works i have no idea.

I think that's what happens, but i may be wrong. All i know is that they happen, and that can be unlucky. Have you had storms near you at all?

[Bisley_Bob]

Alex, I think the MOSFET is on the motherboard and controls the power to the CPU, so it may be causing the power issues. It's the bit under the heatsink right next to your processor (well, on a P5B anyway).
In the psu i thould imagine there will be smoothers which, as the name suggests, smooth the electricity signals. I remember using these in a GCSE physics practical and i broke about 3, so they are very fragile, perhaps that's what gets broken often in PSUs?

[=98=]

There is definately a MOSFET inside the PSU as well, i remember it was in my Custom PC mag. Although, these smoothers your talking about are probably right.
All we did in Physics with "the beard" was throw things at Waz when he was asleep, so i didn't learn much apart from gravity can hurt.

[Hellsent 2.0]

lol good ol' custom pc...

my physics lessons consist of making the teachers cry....

[Battl3fr0nt]

This has happend to me 2 time's, it was my mobo. it died, try 1 stick of ram and see what happen's and reseat you're video card.

[camper.]

Clear the CMOS. MOSFETs are transistors, never thought they taught that in physics.

[Warhawk]

This happened to me a few months ago. After trying to turn it on 5 times, it became completely unresponsive. Turned out my PSU went bad.

[Bisley_Bob]

Clear the CMOS. MOSFETs are transistors, never thought they taught that in physics.

The bit i got taught in Physics was the smooting units which are i believe a series of diodes and bits and bobs, that convert elictricity from the plug socket, which in the UK is 50 pulses per second, to one constant signal.