Q&A for How to Start a SMPS Without a Motherboard

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  • Question
    I sprayed Collins near the fan but it is not working now so what next?
    Community Answer
    Community Answer
    Don't spray any liquid or chemical in an SMPS fan; it can be dangerous as it may harm you (electric shock) and it can break the fan (which may be why yours is not working). In your case, the SMPS parts may be now faulty due to contact with liquid. You may need to replace the fan.
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    Not Helpful 9 Helpful 18
  • Question
    Why do I need a green and black pin when starting SMPS?
    Community Answer
    Community Answer
    The green and black pins are needed to check the serviceability of the SMPS without connecting it to the motherboard.
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    Not Helpful 1 Helpful 15
  • Question
    What do I do if I tried this, but it blew up my PSU?
    JVz
    JVz
    Community Answer
    This is not going to blow up the PSU. I have tried out testing more than 2000 SMPS in this method, but was not successful in blowing out even one PSU so far.
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    Not Helpful 11 Helpful 19
  • Question
    Why does my SMPS start but the fan doesn't operate?
    JVz
    JVz
    Community Answer
    SMPS fan not spinning is not a good sign. Clean the fan and check if dust is preventing the fan from spinning or replace fan with a new one. The SMPS fan needs to be functional to remove the heat inside the SMPS and assist in keeping the components cooler.
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    Not Helpful 5 Helpful 8
  • Question
    What does SMPS mean?
    JVz
    JVz
    Community Answer
    SMPS - Switch Mode Power Supply. SMPS is an electronic device that incorporates a switching regulator to convert electrical power efficiently.
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    Not Helpful 4 Helpful 5
  • Question
    My SMPS fuse gets short-circuited; how can I replace it?
    Community Answer
    Community Answer
    Patch the terminals of the fuse with solder.
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    Not Helpful 12 Helpful 5
  • Question
    What do I do if I don't have a 12v output?
    Community Answer
    Community Answer
    Connect the green wire and black wire on a 24 pin connector with the help of a wire or pin, then turn on the switch.
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    Not Helpful 6 Helpful 5
  • Question
    What do I do if I connected the green and black wires, but my SMPS won't run?
    Community Answer
    Community Answer
    Two options: 1. Take the SMPS to service professionals. 2. Replace with a new SMPS as per your requirement.
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    Not Helpful 1 Helpful 3
  • Question
    I installed a new power supply for my CPU, but it doesn't open when I turn it on. Is it possible that the motherboard is broken or dead?
    Community Answer
    Community Answer
    It is possible that the motherboard has failed. You would want to test it again with the bare number of components to make it work (i.e. the CPU, graphics card, and 1 stick of RAM) - this will help eliminate any other components that could possibly be causing the motherboard to not turn on. If it still doesn't turn on, then I would check to see if there are any bad capacitors on the motherboard; check for capacitors with a domed top sticking up, or any capacitor that looks swollen. I have fixed a few motherboards where a single capacitor caused them to fail.
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