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PC turns on and off half a second after starting

Paaynn -  
txiki Posted messages 6514 Registration date   Status Contributor Last intervention   -
Hello,

I present to you my problem and my situation, thank you for reading me and kindly helping me, I am willing to give a small remuneration to anyone who can solve this problem that has been bothering me for a week now. :laughing:

A month ago, I redid my setup that was 7 years old from A to Z:
Ryzen 5 5600X
B550 Aorus elite v2
B12 650W Bronze PSU
2x 16GB VulcanZ TFORCE RAM (XMP 3200MHZ)
500GB M2 SSD
2TB HDD
3 fans and a low-end Zalman R2 case that is certainly at the heart of the problem.

I kept my old GPU, GTX 1050TI, while waiting to buy a new one, which I did last week by purchasing a RX 6600XT.

The PC was assembled properly by myself and everything worked perfectly until I acquired my new graphics card.
I installed it and everything worked very well until I realized that every time I turned off my PC and tried to turn it back on, this happens:

t=0: I press the POWER button
t=0.1: The lights turn on, the fans spin
t=0.25: Everything turns off

The only way to start it normally is to turn off the PSU, press power to discharge the PC, turn the PSU back on and then the POWER button works normally.

I tried different things: clear CMOS; update BIOS; remove the card, put it back, try with my old card

NO RESULTS, the first 3 launches sometimes work normally but it always bugs out again

My best finding and best lead: THE FRONT PANEL

I noticed that by pressing very lightly (so pressing the power button 1/8 of the max) and very quickly on the power button, the PC starts normally, everything works very well.
The problem is therefore MINOR, but being a perfectionist and a neat freak, it bothers me greatly.

I therefore began to test the front panel, which has always annoyed me, but without success either.

I am therefore running out of solutions and despite my research on the internet, I found nothing regarding my problem.

Thank you for reading me and I hope that someone who is aware of a similar problem can help me solve it.

Have a nice day.

6 answers

  1.
    txiki Posted messages 6514 Registration date   Status Contributor Last intervention   610
     
    Hello Paaynn,
    "My best find and best lead: THE FRONT PANEL": That's also the only thing you haven't replaced. Right?
    I think it's really the Power button that's giving you trouble. If you have the opportunity to replace it, great! For now, it's even the only thing to do.
    And take a good look once it's disassembled, it's often plastic! If you're a bit handy, you should even be able to fix it...
    Otherwise, you'll have to replace the entire case, but that would be a shame!
    Best regards!

    --
    Happiness is the only thing that can be given without having it.
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  2. epango Posted messages 37195 Registration date   Status Member Last intervention   Ambassadeur 4 270
     
    You don't give much about your diet. It might be of poor quality. Did you connect the 8-pin PCI-E power cable to the RX6600XT socket?

    --
    Misnaming things adds to the misery of the world (Albert Camus)
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    1. Paaynn
       
      Thank you for your response, but I'm not a beginner; my equipment was carefully chosen, and I know how to connect my graphics card.
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  3. gil
     
    Hello
    For the power on button, we sometimes sell special ones on Amazon like the Alienware, or simple buttons to install. Very low voltage, almost no current, you can't even electrocute yourself

    https://www.amazon.fr/s?k=bouton+power+zalman+r2&__mk_fr_FR=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2E0QLYBUEWKE6&sprefix=bouton+power+zalman+r2%2Caps%2C691&ref=nb_sb_noss

    It just makes contact when you press it, it cuts off when you release it.
    If your original button makes 2 contacts during the operation, it's normal that it turns off again.

    We can do a test without the button by just making contact with a screwdriver between the 2 power pins of the motherboard.
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    1. Paaynn
       
      I thought about the problem in the same way as you did; I need to do a test with the reset button on my case, to see if connecting the reset to the power pins works right away or not.

      Afterwards, the button is very different from the power one, but I think it supports the idea a bit more.

      The thing is, the power button on my case isn't sold separately, so wouldn't it be better to grab a good deal on a decent case, in case the issue is with the power button?
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    2. Paaynn
       
      The test paid off, the reset button works perfectly on the power pins

      I also noticed that my power button makes 2 contacts (1 when I press and 1 when it pops back up), why is this a problem for me now when I feel like it has always made this sound? Is there any way to modify the button to avoid the second click?
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      1. gil > Paaynn
         
        The click is mechanical; it may have no connection to the electrical contact, which can be silent.
        This is the case with so-called membrane keyboards, where a sound has been added to each key, sometimes delayed, which annoys gamers. It's not the click but the electrical malfunction that would need fixing.

        However, if the reset button works perfectly, you can leave it for the power, you won't need to change the case, these two buttons are absolutely identical in terms of functionality. I can't even remember if I have a reset button; I never use it.
        In the end, I have a reset button, but it doesn't work; I probably didn't bother to connect it, that's so like me.
        Well, the power button works perfectly, you say thanks to the reset button, so your best option was the solution. Besides you, anyone wanting to turn on your PC will search for 2 more minutes.
        As it's always the power button that wears out and isn't sold separately in many cases, you can't imagine the number of PCs that start with the reset button!

        Some PCs have the reset button already on the motherboard. On your motherboard, you have the button to update the BIOS without a CPU, but there are several models, and I haven't looked at them all.
        You can take any button that has the same functionality if you want, and mount it either visible or hidden, outside or inside the case, try to fix the troublesome button, or change the case.
        The case is a matter of taste and colors; now you have all the time you need to see the offer that will make you crack, and you have the excuse of the power button to jump on it when the time comes.
        1
      2. Paaynn > gil
         
        "The click is mechanical, it may have no connection with the electrical contact which can be silent.
        This is the case with so-called membrane keyboards where a sound has been added to each key, sometimes delayed in time which annoys gamers. It's not the click but the electrical malfunction that needs to be fixed."

        "Yes, I see what you're telling me, that's why I'm going to try to change the power switch, it costs less than 5 euros so I don't have much to lose and I enjoy tinkering with my PC haha."


        "The case is a matter of taste and color, now you have all your time to wait for the offer that will make you swoon and you have the excuse of the power button to jump on it when the time comes."

        "Exactly, I'd have a good excuse to buy the next case with monstrous airflow and lights everywhere."
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  4. Paaynn
     
    Or I could just replace the switch like this: https://www.amazon.fr/Ytian-Computer-Flexible-Switch-Bouton/dp/B07C95MW3H/ref=sr_1_4?__mk_fr_FR=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2E0QLYBUEWKE6&keywords=bouton+power+zalman+r2&qid=1647801560&sprefix=bouton+power+zalman+r2%2Caps%2C691&sr=8-4#customerReviews

    But in that case, am I sure that my push button is not going to act up again? What do you think?
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  6. txiki Posted messages 6514 Registration date   Status Contributor Last intervention   610
     
    Hello everyone,
    ▸ gil: "It just makes contact when you press it, it cuts off when you release it": that's a relay switch. Nothing to do with a switch (which is either Closed or Open).
    There are no switches on computers. They are relay switches. You press to close the circuit and power a relay that will keep this circuit closed, but when you release it, it goes back to its original position, Open. OK?
    It's the relay that will maintain the continuity of the circuit.
    To stop the operation, you go through the software (Shut Down) which will cut the relay and thus the continuity of the electrical circuit.
    If the software didn't do this, you would have to turn off the power with the button at the back of the tower.

    ▸ Paaynn: "I need to test with the reset button": the Reset button is closed at rest, opens the circuit when we press it, thus cutting off the relay's power.
    When the computer is powered on, the button is closed (circuit continuity) OK?
    To restart the computer, we press Reset to cut (open) the circuit and by releasing it, it restores (closes) the circuit thus triggering the computer's reboot.

    Regards!
    --
    Happiness is the only thing we can give without having it.
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    1. Gil
       
      Thank you
      I understood how the stop button works, but I learned that it's called a push-button switch.

      So the power button in good condition turns on the PC when pressed but stops the action when released, and the reset button in its place could turn on the PC when released but wouldn't stop the action, which wouldn't be completely normal anyway.
      I believe that soon I will review my push-button switches with a multimeter and not just settle for what forum comments say, even if it seems to work for starting a PC.
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  7. txiki Posted messages 6514 Registration date   Status Contributor Last intervention   610
     
    Hi Gil,
    There are also "push buttons". With or without locking. Like pens.
    With locking: you press and the contact remains closed (by a mechanism). You press again and it unlocks by opening the circuit. Principle of the pen.

    Without locking: you press, (open at rest) you close the circuit, and upon releasing it opens the circuit (diagram below). This is what I meant by "relay" because it works on the same principle by powering a relay that keeps the circuit closed, except that you need a second button to open the circuit.
    This second button will have an opening contact (closed at rest). It can be compared to a Reset.
    I don't know if I'm clear enough but.... 

    What is the difference between a switch and a push button?
    Unlike the push button that returns to its position, the toggle switch stays in the position it is in after being activated, once the lighting circuit is opened or closed.

    How to use a push button as a switch?
    You press the push button; the LED lights up and stays on until you press the button again. This is exactly how it works for a bedroom lamp.

    The simple push button (illustration above) has a NO contact (normally open) that establishes contact when you press it. For the toggle model, it has a NC contact (normally closed) that interrupts contact for the same action.


    Best regards!

    --
    Happiness is the only thing that can be given without having it.
    0