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Help with power supply "paper clip" test

I have a simple doubt, I am currently testing my power supply since my computer wont turn on. I took the power supply off the case, connected only a fan to the power supply cabling, and did the paper clip thing.

When I turn the power supply on, I can see the power supply internal fan spinning all time. But the external fan connected to the power supply only spins for like 1,5 sec when I turn the power supply on, then stops.

Should the external fan be spinning all the time, or only for a sec when I push the on button?

PSU is an Enermax Coolergiant EG701AX-VH.

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More about help power supply paper clip test
  1. Best answer
    It should spin all the time that the PSU is on, I have had a PSU pass the paperclip test but still not be usable in a computer!
  2. Best answer selected by marciotf.
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