PC shut down after 1 sec

[mussafry]

My computer was running fine until i decided to move it. Once i moved it the PC wont turn on anymore. It would turn on for a split second and turn off.

I isolated the problem and found out that my PC will turn on if theres no CPU in the mobo. If i put the CPU back in it would just shut down after 1 sec.

The only thing i can think of is buying a new CPU and hoping it will fix the problem, because i dont know anywhere i can go to check it the problem is with my CPU or not. Before i buy it thought, just wanted some reassurance that it is my CPU andno anything else :shrug::shrug::shrug:

-Mussafry

[little_scrapper]

I thought a CPU was required to post???

[SoulsCollective]

POST =/ turn on.

The problem is unlikely to be the CPU - in all my years of working with tech I have never yet come across a physically broken CPU, only ones burnt out from PEBKAC. This sounds like OCP kicking in, which means you've a short somewhere. Pull all your hardware out and assemble things on a cardboard box out of the case and see if the issue persists.

[patrickgerry]

It might be a short in the case. Try removing the mobo from the case.

[mussafry]

I guess ill give it a shot. ill post back with results shortly.

man its so hard with a WC system in the way :(

[Loser777]

Do you have adequate cooling? This happened to me when I had a loose push pin...

[mussafry]

Well... I took the mobo out put the CPU in with the Stock HSF. connecvted everything but the VGA card cuz its in the WC loop and i cant take it out. ANd i connected a LED fan just to see if it works or not, and same problem. ! sec and the fan shuts off. So does this mean its a CPU problem now?

[SoulsCollective]

It makes it more likely, yes, but not certain. If it is a hardware problem it's much more likely to be a motherboard issue than a CPU.

See if you can get an old toothbrush (dry!) and a can of compressed air and give the socket and the bottom of the CPU a gentle scrub.

[mussafry]

I dont think that will help because... my PC was running for 1 month straight before this happened. All i did was move it :( Worst decision ever Lol

[xenolith]

What do you mean you "moved it"? You mean you moved it to another wall outlet, new house, new state, new country?

If so, maybe the new electrical outlet couldn't handle the power demand and did something to the PSU?

Try a different PSU.

[mussafry]

No lol. Moved it from the floor to my desk. Hehe

[Loser777]

Something could have gotten lose, a screw that could short something, a half-assed mount job that could cause overheating... etc...

[mussafry]

Something could have gotten lose, a screw that could short something, a half-assed mount job that could cause overheating... etc...

I remounted a million times. I even took the Mobo out and put the stock HSF on the CPU. Nothing

[CryptiK]

Tried a new PSU power cable? Double check all the connections between PSU and mobo. Check there is nothing obviously damaged on the front & back of the mobo and nothing is sitting on it like a loose screw etc. Check for damaged pins in the cpu socket.

Can you test your gear in another board?

[Falkentyne]

It's overvoltage protection of some sort and its related to the motherboard
The reason it doesn't turn off without the CPU in there, is because the system can't take on ANY functions without the CPU inside. The BIOS can't even initialize. So the computer will happily remain turned on, UNLESS the power supply itself shuts down.

The system shutting down instantly with the CPU inserted means that the motherboard is detecting a fault somewhere and sending a shutdown signal instantly.

Try this:
still with the case removed:
Make sure all steps are followed, don't leave one out:
Remove EVERYTHING from the motherboard. All jumpers (yes, all case jumpers and chassis intrusion and everything--just keep track of what goes where!), all connectors, cards, including backplates if the board has an aftermarket HSF that uses it, RAM, and CPU. Then 1 at a time, put the CPU in, put thermal compound on, then the heatsink, then put 1 stick of RAM inside, the video card, and then the case jumper connectors (power, reset, power LED, HDD LED and speaker). Before plugging in the PSU itself, move the CMOS Jumper to CLEAR position for 30 seconds. Then put it back on normal, plug the PSU back in, plug in a keyboard and a video cable monitor connector, and then power on.

I bet the system will POST now.
Does it?

If it doesn't, then the motherboard or PSU is bad, but get the CPU tested somewhere first, followed by the RAM (the easiest 2 things to transport and test, tho mounting a CPU isn't the easiest thing)

[mikey063]

I had a similar problem with my system. I basically took the entire mobo out and put it on a static free board and started the system sans case. It started fine.

It turned out that a wire from the front got wedged behind the mobo somehow and one of the metal prongs came loose and was touching the mobo. I fixed that problem reinstalled the mobo and psu and everything worked fine after that.

[mussafry]

I had a similar problem with my system. I basically took the entire mobo out and put it on a static free board and started the system sans case. It started fine.

It turned out that a wire from the front got wedged behind the mobo somehow and one of the metal prongs came loose and was touching the mobo. I fixed that problem reinstalled the mobo and psu and everything worked fine after that.

Yeh i thought doing that would fix my problem. However, my mobo is sitting on a cardboard box right now and its still not working.

[adamsleath]

My computer was running fine until i decided to move it.

i had a problem just like yours recently (lol); i found one bent socket pin that was out of alignment. check your socket pins and have some fine tweezers handy... :p

[mussafry]

SOLVED!!!!!

the new CPU fixed everything :D so happy. So i guess it was my CPU doing the short circuit. Maybe when i moved my PC the waterblock moved a bit and caused t to overheat and die i guess. Only thing i can come up with. Atleast its a reason to get a new CPU

Q9650 ftw!