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ATX SMPS Test
By Jestine Yong on September 5, 2007
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!
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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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
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
Wimpie
July 23, 2012 at 6:00 am
Hi Jestine,
Thanx ill try that.Thanx 4 all the tips.
Wimpie
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
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
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
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
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
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
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
reychie canonigo
October 23, 2013 at 11:19 pm
thank you Sir Yong
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.
Goh K S
July 19, 2014 at 9:45 pm
Just a word of caution, computer power supplies can deliver very high currents especially for the +5V, +3.3V and +12V outputs.
NEVER SHORT ANY OF THE OUTPUTS!