NZXT C850 connected w EVGA molex cable, 12V pin back feeded to 5V. Anybody has experience in this damages repair?

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  • coinwizx
    New Member
    • Sep 2025
    • 5
    • United States

    #1

    NZXT C850 connected w EVGA molex cable, 12V pin back feeded to 5V. Anybody has experience in this damages repair?

    The power supply is 2024 newest version of NZXT C850 modular power supply.

    Cause of damage: I connected EVGA molex cable to the Sata port and test it with a ATX tester. Since the pin out on the EVGA is wrong, result in the 12V pin shorted to the 5V pin, in the 12V back-feeded to the 5v port.

    Damage: Power supply shorted out, shut off itself internally, damaged the 5v or 3v rail or the monitoring circuitry. The self protection circuit shut off the power supply when power up because it detected some abnormal/defect. I waited a few minutes, let it self reset then try to re power up. It try to power up, fan spin up but immediately shut of. When turn on the power switch immediately on a 2nd attemp, it no respon at all, the fan not spin up anymore. Waited a few minutes and try it again, the same behavios happen, fan spin up and shut off on 1st attemp only.

    Help? Seek advice or help from someone who has experience with similar damages or repair this model PSU. What need fix?
  • CapLeaker
    Leaking Member
    • Dec 2014
    • 8340
    • Canada

    #2
    Is about same build style than the Corsair one and utilizes a single WT7527V supervisor IC. Probably this is the one that is a little easier to work on than the Corsair.

    https://www.tomshardware.com/reviews...-supply-review
    Last edited by CapLeaker; 09-16-2025, 04:38 AM.

    Comment

    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31250
      • Albion

      #3
      pictures?

      Comment

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