Is This A Sign Of Psu Failure?

Discussion in 'Hardware' started by techtitan, Dec 17, 2018.

  1. techtitan

    techtitan Specialist

    I just replaced the motherboard and CPU in my desktop (currently running a Biostar TB85 bitcoin board and i74770). This motherboard is a step down for me, as the other I had was a $300 board and I had to replace it with a budget option of only $50.

    The weird thing is, it works great, but the start up lags. I hit the power button from a cold start, and it takes three tries for it to fully power on. No problems or errors, just like it's ramping up to come on. My research tells me this is a sign of a bad PSU, except I never had one single issue with my other board that was more expensive. I've also heard it could be a bad video card (GTX 1060), but I've stress tested all my hardware and ran scans. Nothing is coming back as an issue.

    Should I be looking into a new PSU?
     
  2. Digerati

    Digerati Major Geek Extraordinaire

    I don't see how this could be a "bad" graphics card. But if the PSU is too small (you told us nothing about it) for the extra demands imposed when electronics first power on, that could be an issue.

    Since you just replaced the motherboard and since the case's front panel power button connects directly to the motherboard, I would verify all the motherboard connectors from the case and the power supply are securely fastened. And verify the extra 6-pin connector for the graphics card is securely connected too.

    What does "three tries to fully power on mean"? At what point is it stopping? Is Windows fully updated to include your new motherboard's drivers?

    If you mean it appears nothing happens when you press the power button, it could mean that button switch is failing. That happens. What I have done many times is swap the wires from the Reset Switch with those from the Power Button going to the motherboard, and tie the 2 wires from the power switch back and out of the way. Then I just use the Reset button as the power button from then on.
     
  3. techtitan

    techtitan Specialist

    My power supply is Rosewill around 700-800 watts and has always had enough power to push my current GTX video card and my other motherboard (which was way beefier than the current one). So if anything, this hardware change is a downgrade regarding quality. It's not the power button, I'm sure of that. The system powers on, then sort of shuts off, powers on, shuts off, then on the third time (every time) it boots up just fine. No issues what so ever.

    I also should mention this ONLY happens during the first boot up of the morning, after it's sat over night with no power. I can shut it down all day long and it starts up right away during the day/evening uses. Just that first boot after the overnight. I thought perhaps this is something to do with the new motherboard and how it draws power to get going at first?
     
  4. techtitan

    techtitan Specialist

    EDIT:

    Sorry, I must amend that statement above a bit. I just tired a little experiment, and it appears that as long as the system is on, I can restart it as many times as I want and it's fine. Also, if I just shutdown and then don't allow the power to drain (so if I power back on within a minute or two of shutdown), it's fine. But if it sets for more than ten minutes (long enough for the power to actually drain), then the repeat power on problem persists. The behavior is more weird the problematic, but I would like to know if this is semi-normal for a board of this type, or if there is something else going on.
     
  5. Digerati

    Digerati Major Geek Extraordinaire

    There is no "power drain". That only happens when you unplug the computer from the wall or flip the master power switch on the back of the power supply. But this "drain" happens (by intentional design) in just a couple seconds, not minutes (unless the power supply is faulty).

    In PCs, when you shutdown through Windows start menu or via the computer's front panel power button, you are really just putting the computer in standby mode.

    What it sounds like is happening to me is some device is cooling down after a few minutes and it takes a few jolts from the PSU for it to warm up enough to finally start properly. This could also be a loose connection (did you check those?) or a microfracture in a circuit trace. Matter expands when it gets warm making contact. When it cools, it contracts and opens the contact.

    I don't believe it working on a the 3rd attempt "every time" means anything. I think it just takes a couple false starts and at some point, will only take two, or maybe 4 or 5 and eventually, it will never start - if something is faulty.

    You should probably try a different PSU. If you have the same problem with it, and you are sure all cable connections (and RAM, fan connectors, expansion cards, etc.) are all installed correctly, then it sounds like you got a bad motherboard.

    One last thing. Cases are designed to support 1000s of different motherboards. So they typically have more standoff mounting points than motherboards have mounting holes. Did you make sure you didn't leave any extra standoffs in the case before you mounted the new motherboard?
     

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