Computer powers off within 2 seconds

[accu]

check to see if there are any short circuits, and make sure no extra screws are within your case.

 

[jsc]

It only takes a momentary glitch in the tach pulse to make the system power off. I have seen it before.

That will shut a system down? HMMM. Learned something new. (Wait. That's a redundancy.)

 

[Onus]

I thought a failed fan would produce an alarm before shutdown. This sounds to me like a thermal problem somewhere though, since it runs longer after the system has been allowed to cool off. Is the chipset too hot? PSU? If there's an almost-short somewhere, it could be overloading your PSU and making it shut down. Hopefully unplugging everything but the minimum will find it.

 

[elbert]

On static surface, use what the motherboard can in and place motherboard on it.

You have one of the Debug LED boards by EVGA, so you will need to do this. The instructions are also in Manual and you can also download the Manul from EVGA in PDF file form (using Adobe Acrobat reader to view it).

Once you have it all out of case, follow the below steps.

1) Place on static free sheet/surface.
2) Put in CPU, Graphic card and 1 stick of ram.
3) Connect PSU to motherboard and grapic card.
4) Turn on power and hold in DIY Reset & Power buttons near the Debug LED. page 22 of pdf manual
5) Debug LED Codes on pages 166 thru 168 of pdf manual

If you get a FF code then everthing is OK with what you have in motherboard.

Here is link to PDF Manual http://www.evga.com/products/pdf/680i%20manual.pdf

Hope this helps you out some.

Whats occurring is on system failure your system is set to restart. Turn off restart by going into control panel>system>advanced>click on startup and recovery settings button. There you will see system failure where you can uncheck automatic restart. When your system fails you will see the blue screen of death. On that screen there will be a error message of sorts. Something like IRQ_Less_Than_Equal and just google this for M$ explanation. If you get the IRQ then god help you because then its almost anything.

My best guess is your GPU is overheating or your PSU is dieing.

 

[sailer]

I'm not entirely sure how my GPU melted. I left my comp alone for about a day and a half and left it on. When I came back I had artifacts all over my screen and opened the case up and the plastic on the back of the card was rough in spots and covering the metal. It was an 8800 GTX. My best guess is that some cat hair was pulled up against the case by the intake fan and that stopped cool air from coming in.

Just read through everything and this seems to stand out in my mind. For the plastic to get that hot and melt, there would either have to be a lot of cat hair to cause a major overheat problem or an overvoltage to the card could cause it. If its an overvoltage, I would look to either the psu or the motherboard. Since you wrote that you tried replacing the psu, that leaves the motherboard as the main suspect. Of course, a faulty psu could have taken out both the video card and the motherboard, and perhaps other parts as well. Even if it was excessive cat hair that caused an overheat, a lot of other parts could have been damaged.

This is a time where your present parts, ram, cpu, graphics card, sound card, etc, need to be tested one by one on a working system. Any one part or combination of parts may have failed. If you can't do that for any reason, it might be cheapest and quickest to take your computer into a shop and have them run a diagnosis. Then they can tell you what's wrong and you can replace the parts as needed yourself. I did that myself a couple years ago when one of my computers refused to work no matter what I tried. It cost me $35 and saved me hours worth of frustration and probably lots of money, as I didn't end up buying any unneeded parts.

 

[Martell77]

Have you inspected the Mobo capacitors for doming or leaking?

I had a computer that would work for a couple of minutes then power off, occasionally it would work for up to 45 minutes then reboot, then it would start into a reboot cycle every couple of seconds. Had to leave it off for a few hours to get it to work again for the short period.

I checked my motherboard and found several of the caps were domed and a few were leaking. I replaced the Mobo and the system works great.

Its possible the computer too a power spike that was just enough to kill an aged or defective cap. I have both my computers connected to surge protecters yet the one took a hit that jacked the Mobo but didn't affect the protector. (I know because that same protector saved the computer about a year later and was then replaced)

Anyway, something to check if you haven't already.

 

[slavadon]

Thanks for all the help guys. Eventually the barebones setup just totally died on me while I was messing around with it. Total failure to post. The only signs of life are a blue power LED on the mobo and the fans spin up for about a second before going off. I went ahead and took the mobo in to a local comp shop to have them make sure it's actually dead. Went ahead and ordered another motherboard.

 

[PCKid777]

And low and behold, my cheap case manual didn't mention that either!

 

[slavadon]

I don't think I saw anything about that in the Centurion manual, but I could've missed it. Cooler Master manuals are usually pretty terrible.

 

[ssbtoday]

um its probally the processer shorting out because i have the exact problem

Spoiler

LOL