Solved Pc shutting down after a second

May 21, 2016 at 03:21:36
Specs: Windows 7
Desktop pc starting and shutting down in a second non stop until i turn off the power. I try unplug the 8pins connector to the motherboard and the pc is not turning off but nothing is showing on the screen

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#1
May 21, 2016 at 04:42:53
✔ Best Answer
8-pins power connector?? Don't play with power cables! You're doing more damage than good.

Try to reset the CMOS (jumper see your MB manual!)


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#2
May 21, 2016 at 05:36:25
Why would you recommend a CMOS reset?

The 8-pin plug powers the processor, without it, the CPU will receive no power & system will not boot. Had you made any changes just prior to this on/off cycling problem? If you did, try undoing the changes.

It's possible that your power supply is failing. Please post the make/model of your PC, your complete system specs (if you know them), & your power supply make/model & specs (not just wattage).

http://www.hardwaresecrets.com/ever...

message edited by riider


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#3
May 21, 2016 at 13:00:23
No i didnt make any changes. It was an old pc i took out to try yesterday. Everything was fine but not after i shutting down the pc and the power socket at night. The next day when i try again, the problem came. I just try to unplug each of the cables and see whats the result. The pc wont try to start and off if i unplug the 8pin connector to the motherboard. Therefore, i want to make sure which is the problem before i went buying a psu or motherboard. Thanks for the help.

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#4
May 21, 2016 at 13:05:01
It switched on, but it would switch off on its own after about a second. It would automatically switch on on its own again after another 2 seconds, and the sequence repeats. (By switching on, I mean the PC's fan, and lights in the CPU were on...)
Throughout all, this, there was no beep or bios, or any signal to the monitor.

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#5
May 21, 2016 at 13:27:29
SPOT ON!!! i tried to replace the battery and turn on and off as well but for the third time after that, everything went alright. THANKS mate.

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#6
May 22, 2016 at 11:26:04
I'm surprised the CMOS reset did the trick but kudos to sluc for getting it right. I'm still suspicious of the power supply though because the "switch on on its own again after another 2 seconds, and the sequence repeats" seems more like a power issue.

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#7
May 22, 2016 at 20:40:41
riider: This is very similar to the issue I recently had and I was pretty sure it must be the power supply but swapping it out did not help so as a last resort I also did a clear CMOS and it booted up into BIOS and I was able to straighten out settings and then another minor issue that appears to be connected.
http://www.computing.net/answers/ha...
This suggestion just got him there sooner.

You have to be a little bit crazy to keep you from going insane.


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