PSU My PSU only works, sometimes?

Discussion in 'Hardware' started by AT0MAC, 14 Nov 2021.

  1. AT0MAC

    AT0MAC Pirate Captain

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    I have a Seasonic X-400 Gold that runs my UnRaid server.

    Issue is, now it only works sometimes?
    I can power it on, nothing happens, but turn the on/off switch on the backside on and off like 10 times and suddently it fires.

    There is something wrong with it, but I cant figure out what or why.

    So, I dont totally trust it any longer.

    My UnRaid is only powered on maximum 3 times per month, its a cold storage local backup.
    So it runs 5 harddrives and a ssd, a low power CPU and 2x sata controllers, plus 4 fans. I know It dont pull more than around 150watt in total, so the 400w is no limit

    Modular design is a big plus, as it helps routing in my 4U case

    But what should I replace it with?
    Dont want to spend a fortune due to the not so often use, but then again, also want a reliable unit that dobt catches fire.

    What to do?
     
  2. David

    David μoʍ ɼouმ qᴉq λon ƨbԍuq ϝʁλᴉuმ ϝo ʁԍɑq ϝμᴉƨ

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  3. AT0MAC

    AT0MAC Pirate Captain

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  4. Vault-Tec

    Vault-Tec Green Plastic Watering Can

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    Have you tested the PSU? like with a paper clip? you may find it's the motherboard.

    Stick a paper clip on it and see if it starts every time.
     
  5. AT0MAC

    AT0MAC Pirate Captain

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    Yup I did, also tested the motherboard with a different PSU, motherboard totally work.

    The psu dont, and i dont know why.

    I tested it with a clip and a molex fan, so i could see when the fan spun up it was on, it works about 1 out of 10 tries
     
  6. Vault-Tec

    Vault-Tec Green Plastic Watering Can

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    Oh OK man, cool to know. Maybe the protection circuitry has failed :)
     
  7. LennyRhys

    LennyRhys Oink!

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    The most common fault with PSUs is bad (read: cheap) electrolytic caps... even just one bad cap can mean life or death for the unit.

    If you are thinking about putting the PSU in the trash, hit me up first - I will happily pay postage if you are willing to send it to me (if you are in the UK)! :thumb:
     

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