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Computer boots 2 seconds after shutting it down

Discussion in 'General Hardware' started by Gamax, Jul 3, 2008.

  1. Gamax New Member

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    So today my computer has been acting weird.. everytime I shut it off, it starts up 2 seconds after all the fans stop and the leds are off. Only way to turn it off for good is pushing the power button, does anyone know what can cause this?

    Specs

    Opteron 170
    8800 GTS
    MSI K8N Neo4 Platinum
    Enermax Liberty 500W
    OCZ Platinum 2GB DDR
     
  2. Grasshopper New Member

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    Check in BIOS -> Power setings. There should be a option "AC Back Function" (that what it's called in Gigabyte MBs). It should be set to "Soft off".
     
  3. Gamax New Member

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    Here it's called "Restore on AC power loss" and yes it's set to off.
    I don't get why it's been doing this,since it hasbeen working fine for 3 months.

    Anyone else?

    Thnks
     
  4. oli_ramsay

    oli_ramsay

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    Could try reseting CMOS?
     
  5. psyko12

    psyko12

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    Wake up on pci event or even wake up on lan event on bios settings?
     
  6. CrackerJack

    CrackerJack

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    you don't have the shut down and reset wires backwards by any chance?
     
  7. Gamax New Member

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    It doesn't work :(
     
  8. Gamax New Member

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    I don't have those settings but everything is disabled.
     
  9. JoshBrunelle

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    I assume you are powering down with windows. Try typing this in to a run box to shutdown next time.

    shutdown.exe /f /s /t 01

    This will shut it down and if it stays off windows may be sending off a restart command for no apparent reason instead of a shutdown.

    Just trying to eliminate software as the problem.
     
  10. suraswami

    suraswami

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    Did you setup the wakeup events for Keyboard or Mouse?

    I am thinking its a Bios issue. Update bios if its available.
     
  11. Gamax New Member

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    This didn't work :( Thank you for your help though. As I said, it doesn't reboot. It completely shuts off, then it starts up again.

    I didn't set up anything.. it's always been on disabled.

    I will, thanks.
     
  12. selway89

    selway89

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    I had this with my pc not long ago. I believe it was a USB device causing it. One thing to try is to unplug all USB devices and plug them in one by one to try elimiate it. But mine has stopped now, I forget the culprit but I must have plugged it back into a different socket and it hasn't done it since.
     
  13. Gamax New Member

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    Well only USB device I have plugged in is my mouse.

    Edit: nvm.. it's actually plugged by the PS2 on the mobo.. and updating the bios hasn't worked :(
     
  14. eidairaman1

    eidairaman1

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    One suggestion, power-up the system, unplug the power and reset buttons from the motherboard then shut the machine down via windows. There is possible chance the power or reset buttons are sending a signal to cause machine to start back up. If the problem stops, plug in both again and start up then remove the reset button from the motherboard, shut down windows through windows and see if the system starts back up, if it doesn't start back up the reset switch is the culprit, if the system does start backup then possibly the power switch is the culprit. Do not use the switches to shut down, use Windows to shut down when troubleshooting this issue.

    A few other possible problems are, a setting within Windows preventing shut down, this occurred in Windows 98/98SE on faster machines, which MS supposedly Fixed in Win2K and XP, or the ACPI/APIC is messed up within Windows itself, but I honestly think its a power switch problem.

    Last Ditch Solution if none of the above work, try a different power-supply, higher rating, as I am unsure a 500 watt handles the machine properly- with the above troubleshooting tips in paragraph 1. Suggestion 2, remove the motherboard with the harddrive and powersupply and any other AGP/PCI/PCIe/USB brackets/cards, run them on a bench with the above trouble shooting tips in paragraph 1 and see if the problems stop- possible shorting in the case, or a card is making a connection with the case and motherboard, or the motherboard back side is touching the case.
     
    Last edited: Jul 3, 2008
    Gamax says thanks.
  15. xubidoo New Member

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    possibly a faulty power switch on the case ?

    ive had that before,where the switch itself refuses to stay off,try taking it off and giving it clean.
     

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