ATX SMPS Test

By on September 5, 2007



atx smps test

ATX SMPS Test is very easy. Just use a scrap motherboard and connect the power supply onto it and place a wire across the two pins shown in the picture below in order to turn the ATX power supply “On”. If possible place two more harddisk to act as load just incase the single motherboard load not enough to switch it on. The symptom could be the fan rotate for a while and then totally stop!

atx power supply on

Be cautious that not all ATX power supply support all kinds of motherboard. Some power supply just need back its own motherboard or system in order to function properly. Hope after reading this tips you should not have any more problem for ATX SMPS Test.

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369 Comments

  1. Wimpie

    July 21, 2012 at 1:36 pm

    Hi Jestine,
    thanx 4 the link, if atx power supply strart with 12v automotive lamp as load just 4 a second and then stops what can cause problem?
    Wimpie
     

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    • Jestine Yong

      July 21, 2012 at 11:52 pm

      Hi Wimpie,

      I suggest that you connect the board with a junk motherboard and harddisk because a single lamp may not enough as a load and the power supply will shutdown.

      Jestine

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  2. Wimpie

    July 23, 2012 at 6:00 am

    Hi Jestine,
    Thanx ill try that.Thanx 4 all the tips.
    Wimpie

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  3. Timothy Sutton

    August 11, 2012 at 3:08 pm

    I have a Bestec ATA 400W power supply of two HP Media Centers... Both of them burned out within a week of each other
     
    Do you have any idea what goes out in these?  The led is on but no motherboard power.
     
    Thanks,
    Tim

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    • Jestine Yong

      August 14, 2012 at 2:59 am

      Hi Timothy,

      One need to open up and check. It can be any bad components that had caused the motherboard not working. Try check if there is any bad filter caps.

      Jestine

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  4. Dinesh

    August 23, 2012 at 9:02 am

    Hi,
    I have 300w smps now is daid. i check rectifire bridge geting 298 vdc, but not geting H.V plesse guied me

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    • Jestine Yong

      August 24, 2012 at 1:56 am

      Hi Dinesh,

      Have you check all the components in the primary side? What about secondary output diodes?

      Jestine

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  5. amir mukhtar

    September 19, 2012 at 7:58 am

    Sir. with your permission i want to share my knowledge about in power supplies:
    there are more than one types of power supplies. which have been using in computers and its allied equipments. Like, 
    1.   AT
    2.  ATX
    3.  NLX
    4.  LPX
    5.  Special Type (Monopoly) Quad Processor Machine Power Supply. which only use in Super computers and Centeralize Data Computing Machines.
    Thanks you
    YOURS STUDENT
    AMIR MUKHTAR ASHRAFI

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  6. GAGAN

    September 29, 2013 at 3:37 pm

    i have a power supply when i check it will be start for on second and after that not start the computer pls help me sir

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    • Jestine Yong

      September 30, 2013 at 9:27 am

      HI Gagan,

      What have you checked in the atx power supply? Have you checked the filter caps?

      Jestine

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  7. reychie canonigo

    October 23, 2013 at 11:19 pm

    thank you Sir Yong

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  8. Humberto N. Rdguez.

    November 13, 2013 at 12:55 am

    Well, let's take a little care with this test, because many times the SMPS can turn on but no video on Display. Sometimes it has happened to me.

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