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Problem with PSU

  • 12-12-2006 8:09pm
    #1
    snoopy5
    Closed Accounts Posts: 7 ✭


    Could anyone help me with this problem. The fan on the PSU comes on with just the mains power supply on, the PC is not switched on. Have tried disconnecting everything and only the ATX cable and 12v cable are on the MOB.
    It is a 2.6ghz, P4. the PSU is a 400watt ATX. I have tried it on another PC and it works no prob.
    Please help


Comments

  • #2
    KELTICKNIGHTT
    Registered Users, Registered Users 2 Posts: 3,799 ✭✭✭KELTICKNIGHTT


    check you bios to see


  • #3
    snoopy5
    Closed Accounts Posts: 7 ✭snoopy5


    Hi,

    thanks for answering. have checked the BIOS and there isnt anything there for power settings.


  • #4
    KELTICKNIGHTT
    Registered Users, Registered Users 2 Posts: 3,799 ✭✭✭KELTICKNIGHTT


    do you have brand or model ?


  • #5
    snoopy5
    Closed Accounts Posts: 7 ✭snoopy5


    It is an E_Machine 5220. 2.6ghz. The power supply is DR-A300 ATX


  • #6
    KELTICKNIGHTT
    Registered Users, Registered Users 2 Posts: 3,799 ✭✭✭KELTICKNIGHTT


    made by eagle
    will check


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  • #7
    KELTICKNIGHTT
    Registered Users, Registered Users 2 Posts: 3,799 ✭✭✭KELTICKNIGHTT


    its a normal standard psu
    disconnect the power to mobo
    and see what happens


  • #8
    snoopy5
    Closed Accounts Posts: 7 ✭snoopy5


    Hi

    Have disconnected the power from the MOB and nothing happens, the fan on PSU doesnt come on, it comes on when i connect the power to the MOB


  • #9
    KELTICKNIGHTT
    Registered Users, Registered Users 2 Posts: 3,799 ✭✭✭KELTICKNIGHTT


    how long have you this pc
    did you do something to it sinse it happen or before,upgrade or in bios


  • #10
    snoopy5
    Closed Accounts Posts: 7 ✭snoopy5


    Had to replace the PSU with this one because the original one went completely dead. Havent changed any of the bios settings. The PSU that is in it now has been tried on another PC and it is fine, I also took the PSU out of another PC and put it in this one and it does the same thing, comes on when the mains is switched on before the pc is switched on.


  • #11
    KELTICKNIGHTT
    Registered Users, Registered Users 2 Posts: 3,799 ✭✭✭KELTICKNIGHTT


    some psu stay on after you turn off pc,never had a fan on psu be on when pc off,could try clearing your cmos.see if it helps


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  • #12
    snoopy5
    Closed Accounts Posts: 7 ✭snoopy5


    If i do clear the cmos will this effect Windows as I dont want to reinstall just now if I can help it


  • #13
    8T8
    Closed Accounts Posts: 4,757 ✭✭✭8T8


    Clearing the CMOS only resets the bios back to the default settings it wont affect Windows though you would need to go over the bios and maker sure everything is set the way you want.

    However I do not believe clearing the CMOS will help in this case because it is a PSU compatibility issue.

    E machines could have wired their motherboard to only accept their own PSU's via a different pin out for example it was something Dell used to do or it requires specific ATX revision of the PSU in order to work (again the reason is so you can only use there own parts).

    Anyway that is my guess but I will have a look for any info to confirm that (hopefully not).

    The other possible cause is a short somewhere in the case disconnect everything and double check the connections & that nothing is interfering with the motherboard then plug in only the basics video, RAM, mouse, keyboard and power on the system and see if it boots.


  • #14
    snoopy5
    Closed Accounts Posts: 7 ✭snoopy5


    Hi

    It was just an ordinary ATX power supply that was in it. Have checked all cables etc and it boots to windows no problem. I think I am just going to have to live with switching it off at the back as everything seems perfect. Many thanks for your time and effort ;)


  • #15
    Ghost Train
    Registered Users, Registered Users 2 Posts: 30,475 ✭✭✭✭Ghost Train


    snoopy5 wrote:
    Hi

    It was just an ordinary ATX power supply that was in it. Have checked all cables etc and it boots to windows no problem. I think I am just going to have to live with switching it off at the back as everything seems perfect. Many thanks for your time and effort ;)

    Maplin (Blanchardstown) had a wireless remote control power socket the day before yesterday for a tenner, might make life easier :)

    http://www.maplin.co.uk/Module.aspx?ModuleNo=98630&criteria=REMOTE%20CONTROL&doy=14m12


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