Desktop won't start with Case Fans

My friends computer is working when the case fans are unplugged, everything was brought yesterday and built last night apart from the Power Supply which she now mentioned went pop bang a few years ago and has been worked to this day. When the 3 fans are plugged in and we try to start the computer the PSU makes a ticking noise but the light on the RGB RAM light also lights up but computer doesn't start. When unplugging the 3 fans the computer starts and can be used under heavy load with games open without the computer turning off.

Does anyone have any ideas what the issue could be? My only thought could be the power supply not working 100% as it has gone pop bang in the previous years.
9 answers Last reply
More about desktop start case fans
  1. Are the fans connected to the motherboard fan headers, or to a molex connector on the power supply?
    There may be an issue with particular connectors or rails on the power supply.
    It is also possible but less likely that the case fans are shorting. Can you try them individually rather than together?
  2. VincentP said:
    Are the fans connected to the motherboard fan headers, or to a molex connector on the power supply?
    There may be an issue with particular connectors or rails on the power supply.
    It is also possible but less likely that the case fans are shorting. Can you try them individually rather than together?


    The fans are connected directly to the motherboard as system fans.
  3. Drkgamer said:
    VincentP said:
    Are the fans connected to the motherboard fan headers, or to a molex connector on the power supply?
    There may be an issue with particular connectors or rails on the power supply.
    It is also possible but less likely that the case fans are shorting. Can you try them individually rather than together?


    The fans are connected directly to the motherboard as system fans.

    The motherboard should have two power connections from the PSU; The large 24 pin connector and a smaller connector for additional 12V power with 4 pins or 8 pins depending on the motherboard. Are these both connected?
  4. VincentP said:
    Drkgamer said:
    VincentP said:
    Are the fans connected to the motherboard fan headers, or to a molex connector on the power supply?
    There may be an issue with particular connectors or rails on the power supply.
    It is also possible but less likely that the case fans are shorting. Can you try them individually rather than together?


    The fans are connected directly to the motherboard as system fans.

    The motherboard should have two power connections from the PSU; The large 24 pin connector and a smaller connector for additional 12V power with 4 pins or 8 pins depending on the motherboard. Are these both connected?


    Yes they are both connected the computer works fine until the fans are plugged in.
  5. Just connected them individually, working with all 3 for now.....It was working like this last night then today had to unplug them to make it start up again.
  6. Which motherboard? Sure you use fan headers to connect to?
  7. Vic 40 said:
    Which motherboard? Sure you use fan headers to connect to?


    The motherboard is the GA-270X Gaming K5
  8. Replaced PSU, all working fine now
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