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PC Power Supply Test: How to Connect a Fan to the Power Supply?

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aurecp83 Posted messages 2 Status Member -  
 coco -
Hello everyone!
After 3 days of research on the subject I haven't found, I don't know what to do anymore! Please help me?
I want to test the power supply of my desktop PC which won't turn on anymore, so I understand the system with the paperclip, thanks to the forum for all this info, but now how can I connect my fan to the power supply?
Let me explain, it's an Evercool DC Brushless EC8025L12SA-CL fan with three wires: a blue one, a red one, and a black one with a piece of "plastic" (sorry, I'm really a beginner lol) where you can insert small pins. So I have a small pin to Molex connector, but there are only two wires: a black one and a red one. My question is: Should I connect the black wire of my fan to the white wire of the connector or the blue wire to the white wire?
Thanks to you?

4 answers

  1.
    didmed Posted messages 2654 Registration date   Status Member Last intervention   845
     
    Hi.

    If you want to test the power supply, connect the hard drive (to the Molex connector that provides 5V and 12V) > since it's a switch mode power supply, it needs to start "under load," so with a device connected to it
    > the fan is good, but if the connection is wrong, hello damage...

    1- So connect the hard drive with the Molex connector (or SATA connector if it's a SATA hard drive):


    2- then turn it on with a paper clip
    3- once started, test the voltages with a multimeter on the 20 or 24 pin connector:



    @+

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    If you need anything, just let me know!...
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  2. aurecp83 Posted messages 2 Status Member
     
    Thank you, but unfortunately, I don't have a multimeter.
    And why connect the hard drive to check if the power supply is working? I don't understand.
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  3. didmed Posted messages 2654 Registration date   Status Member Last intervention   845
     
    It's a quick method > the hard drive has the right connector and the power supply does too > it's fast!

    --
    If you need anything, just let me know!...
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  4. didmed Posted messages 2654 Registration date   Status Member Last intervention   845
     
    If you don't have a multimeter, it's a hassle > with this one, you could check if all the voltages are present...

    See you later

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    If you need anything, just let me know!...
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    1. coco
       
      Hello
      Well, for the house car PC, if you’re not an electrician, a basic one will be sufficient.
      Presence/absence of voltage 230v AC 12v DC 5v DC 3.3v DC battery and accumulator 1.5 to 12v or more DC, fuse or wire good/broken, ... Lots of other things.

      Also, power supplies burn out if you don’t have at least one hard drive connected (a common design flaw deliberately made by the manufacturer to save costs), I learned that when I tested my first power supply, it was supposed to be good but I made it smoke>trash.

      http://www.dx.com/fr/p/dt-830d-portable-2-lcd-digital-multimeter-orange-black-1-x-6f22-205176#.VpqSoR5lQwI
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