New build System starts up then shuts down 10sec after boot up.

[Dave726]

There is no OS installed due to it wont stay on long enough. I've change the PS Ram HD Video cards. So here's the run down on what happens.

I turn it on.
It boots up to the bios stays like that for appx 10-15 sec then shuts down no error or anything.

I have a xfx nforce 780i mother board on the mother board it seems to shut down after 7F which is POST error check it seems to go to FF for a second then shuts down FF is Boot.

MY set up is

NVIDIA nForce 780i SLI Intel Motherboard
Intel Core 2 Quad Q6600 2.4GHz
4GB DDR2 SDRAM DDR2 800
EVGA GeForce 8800 GT 512MB 256-bit GDDR3 X2
Western Digital Raptor 150GB 10000 RPM
Seagate Barracuda 250GB 7200 RPM
ABS Tagan BZ Series 900W
If i can get the os in Vista 32bit

I hope i gave enough info, if you need any more just ask. Thanks for the help

 

[shadowduck]

Sounds like a heat issue. In the few seconds it on.. try to get into bios and check the temp of your CPU. You might not have the heatsink properly attached to the motherboard. Those pushpins sucks.

 

[arkadi]

Heat sounds about right,but try to disconnect power on cable from the mombo, and check you power on button.

 

[wesbuck]

Have you plugged in the cable for the cpu, 4 pin i think it is, located near the cpu.

 

[Tozma]

on one of my old computers I experienced something similar to that. where I would get to desktop it would shut down. you might want to reconnect everything, after I did that seemed to fix the problem but shadowduck might be right as well could be a heat issue

 

[wesbuck]

Hmmm ye but would that cpu heat up that fast?? i would have thought u'd at least be able to get to the bios.

 

[arkadi]

if your cooler not in place, it same as you got non...

 

[neveremember]

i don't suppose there is a voltage switch on the back of your PSU? if there is one, and it got switched to the wrong position, it could cause what you're describing.

 

[shadowduck]

Hmmm ye but would that cpu heat up that fast?? i would have thought u'd at least be able to get to the bios.

Yes, it can go from room temp to 200F in moments.

I didn't have my heatsink on right at first, my CPU went from 30C to 106C in under 20 seconds.

 

[jsc]

i don't suppose there is a voltage switch on the back of your PSU? if there is one, and it got switched to the wrong position, it could cause what you're describing.

Unlikely.

dave said, "I have a xfx nforce 780i mother board on the mother board it seems to shut down after 7F which is POST error check it seems to go to FF for a second then shuts down FF is Boot. "

If the PSU were set wrong, he would not get the motherboard LED codes. "7F" means it successfully completed the POST.

My first guess is a thermal problem because of an improperly mounted heat sink. My second guess would be some kind of problem with PSU.

 

[Dave726]

Hey guys thxs for all the info, Yeah i just detached the Heat sink and reattached it and all is well. Got the OS in and all the updates i had it running for a good 4hrs. My CPU temp is 40c idle this is with a stock heat sink i will be getting a new one soon.

So thxs for all your help.