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  • #4023441

    PC won’t boot suddenly


    by 22nitram06 ·


    So small backstory
    around half a year I build my first PC everthying das completely fine until recently. About a week ago after booting up my PC it would completely shut down after around 20s. Tried a few time but it remained. So I remembered that a few of my Data connections to my HDD and SSD were a little bit bent so I fixed that and my PC worked again without a problem. That’s was until today.
    I booted up my PC and after like 5 seconds it shut down. Thought maybe it’s the sata cables again, fiddled with them a bit and tried again but now to PC wouldn’t even boot. The PSU just made a short onetime clicking sound and nothing more. So I disconnected everything beside the 24 ATX PIN and tried again and the motherboard showed it had power. Connected to CPU Pin and still worked and all the Motherboard LEDs were showing green. But when I tried to connect my Graphic card it booted but shut down again after 5s. Connected all my sata cables and the PC wouldn’t boot again. Only the PSU made one clicking sound. So I disconnected everything expect the 24 ATX Pin and still nothing worked. The motherboard showed a red led by the CPU connector that it wasn’t connected witch it hasn’t done before (but that probably means the motherboard got power if a led was glowing?). I tried everything. Reconnected every cable checked every connections but still nothing just a short onetime clicking noise from the PSU.
    So I’m thinking that’s it’s probably a problem with the PSU (maybe 750W wasn’t enough) or the motherboard but I don’t really know how to check

All Answers

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    • #4023461
      Avatar photo

      Re: PSU

      by kees_b ·

      In reply to PC won’t boot suddenly

      The easy way is to try another PSU. The somewhat more complex way is to get your Volt-meter and see if all power outputs are what they should be.

      Sometimes it helps to disassemble the PC, and test with only the PSU, the motherboard, mouse and keyboard outside the case (the “cardboard test”). If the motherboard doesn’t have its own graphics, you might need your graphic card also, to see the boot messages and the error about no hard disk found if the beeps aren’t clear enough. But the more hardware, the more can be defective.

      • #4023475

        Re: Re: PSU

        by 22nitram06 ·

        In reply to Re: PSU

        Hi thank you for the answer
        I have a spare PSU laying around I will be testing with with and hopefully everything will work with it. Otherwise I will probably have to disassemble the whole Pc and test every part of it since I sadly don’t have a Volt meter

        • #4023498
          Avatar photo

          Reply To: PC won’t boot suddenly

          by birdmantd ·

          In reply to Re: Re: PSU

          FWIW: Voltmeters can be cheap. Since you say that you don’t have one, you should get at least a basic model for under $10 or even less to have around the home. Never know when you might need one. Most folks should have one in their toolkit.

    • #4031232

      Reply To: PC won’t boot suddenly

      by Johnharper2020 ·

      In reply to PC won’t boot suddenly

      To fix a Windows PC that won’t turn on, first try ruling out a faulty power supply or outlet. You can also try checking for beep codes, display issues, unusual BIOS settings, or troubleshoot the PC in Safe Mode. Other fixes include disconnecting non-essential devices and checking for loose components and malware.

    • #4044168

      Reply To: PC won’t boot suddenly

      by chrisleygio31 ·

      In reply to PC won’t boot suddenly

      What could be causing your PC not to boot suddenly? The most common cause is the memory. This is because the ram can become weak in time. If you haven’t done any troubleshooting, then this is the first thing to check. Make sure your motherboard has enough power.

    • #4118219

      Reply To: PC won’t boot suddenly

      by meetgaryk ·

      In reply to PC won’t boot suddenly


      Based on your troubleshooting, it seems likely that the issue could be with either the PSU or the motherboard. To further diagnose the problem:

      PSU: Since you hear a clicking sound and the PC shuts down, it’s possible that the PSU is not supplying adequate power. You may want to consider testing with a different PSU to see if the issue persists.

      Motherboard: The red LED by the CPU connector could indicate a power-related issue. Double-check all connections to ensure they are secure. It’s also worth inspecting the motherboard for any visible signs of damage or blown capacitors.

      If you have access to spare components or another system, you could try swapping parts to identify the faulty component. Alternatively, seeking assistance from a professional or a knowledgeable friend who can physically inspect and troubleshoot your PC may be beneficial.

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