Constant but irregular hissing noise - not the fan - FSP300-60THA

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  • SuperDuty
    Badcaps Veteran
    • Mar 2011
    • 299
    • France
    #1

    Constant but irregular hissing noise - not the fan - FSP300-60THA

    Hi,

    Yesterday I've changed my main computer case and decided to change the fan of my backup Fortron PSU, since it was making a slightly annoying hissing noise since I've installed it. Actually, when I got this PSU, the original fan was clogged and dirty so I've never used it with the original one.
    But after swapping the fan AND the temp control unit from another identical power supply, the problem isn't solved...when I stop the fan, the noise is still there.
    It's not a regular noise, but its constant at idle. Scrolling in Firefox will change the hissing. The noise goes away at higher loads (any game, or any heavy app). It scares me a bit now since I've used this PSU with this noise for about two months without any problem...


    It's full of Teapo and OST in there, but I did not see any buldged cap.
    Tags: None
    • shovenose
      Send Doge Memes
      • Aug 2010
      • 6575
      • USA
      #2
      Re: Constant but irregular hissing noise - not the fan - FSP300-60THA

      I've got an old 250w FSP that does something similar and I'd be interested to see if there is a resolution to this.

        Comment

        • c_hegge
          Badcaps Legend
          • Sep 2009
          • 5219
          • Australia
          #3
          Re: Constant but irregular hissing noise - not the fan - FSP300-60THA

          Most likely the caps are going bad. Teapo and OST (especially the latter), are both notorious for failing with no visible signs. Most if not all FSPs this age have bad teapos and/or OSTs
          I love putting bad caps and flat batteries in fire and watching them explode!!

          No wonder it doesn't work! You installed the jumper wires backwards

          Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium

          Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 Pro

            Comment

            • ben7
              Capaholic
              • Jan 2011
              • 4059
              • USA
              #4
              Re: Constant but irregular hissing noise - not the fan - FSP300-60THA

              A few things that might be the problem:

              1. Loose inductor wires/core
              2. Bad caps
              3. Unstable control loop (usually caused by bad caps!)

              Hmm, this reminds me that my laptops psu squeals a bit when unloaded, but I think its just from hiccup mode.

              First thing I would do is recap, Teapooos and Osts can be unpredictable.
              Muh-soggy-knee

                Comment

                • b700029
                  Banned
                  • Sep 2010
                  • 640
                  #5
                  Re: Constant but irregular hissing noise - not the fan - FSP300-60THA

                  The hissing could be coming from the CPU vcore regulators, not the PSU. It just so happens that the two are close together inside a regular PC case.

                    Comment

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