Occasional failure to boot up first time

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  1. Posts : 19
    Windows 10 Home
       #1

    Occasional failure to boot up first time


    Hi,

    I am running Windows 10 20H2 (OS Build 19042.928).

    About once every six times I press the start button on my PC it lights, the keyboard lights flash twice, then it just dies. Sometimes I have to press Start button two or three buttons before it starts, then it seems fine. Someone before suggested I replace the motherboard battery, which I have done, but still get the same issue. Any clues?

    Thanks,

    David
      My Computer

  2. hsehestedt's Avatar
    Posts : 2,283
    Windows 10 Pro, 20H2
       #2

    David, can you tell me if this issue only happens from a cold boot? In other words, is the problem only happening when the system is started after a power off but not when you perform a restart?

    If that is the case then I suspect that you may have something not getting along with Fast Startup. Try disabling that and see if it helps. To do so, follow the steps in this tutorial:

    Turn On or Off Fast Startup in Windows 10
      My Computers

  3. Steve C's Avatar
    Posts : 6,533
    Windows 10 Pro 64 bit
       #3

    Did you check the voltage of the new CMOS battery was over 3V and load the BIOS defaults?

    I had a similar issue due to a faulty power supply which did always supply the required +5V standby power line required to boot the PC when the on button is pressed. I eventually had to replace the PSU.
    The PSU should generate a +5V standby output to the motherboard at all times when the PC is off and the PSU is turned on at the mains. Pressing the PC power on button causes the motherboard to send a power on signal to the PSU (derived from the +5V standby power line). The PSU should then respond by outputting the correct voltages on all rails and sending a Power Good signal to the motherboard when the voltages have stabilised - this usually takes 0.1-0.5 sec.
      My Computers


  4. Posts : 19
    Windows 10 Home
    Thread Starter
       #4

    hsehestedt said:
    David, can you tell me if this issue only happens from a cold boot? In other words, is the problem only happening when the system is started after a power off but not when you perform a restart?

    If that is the case then I suspect that you may have something not getting along with Fast Startup. Try disabling that and see if it helps. To do so, follow the steps in this tutorial:

    Turn On or Off Fast Startup in Windows 10
    Yes the issue only happened with a cold boot. I have switched off Fast Startup so will see how we go. Thanks.
      My Computer


  5. Posts : 415
    Windows 10 Home 21H1 x64
       #5

    Suspect bad caps in the PSU, if the same thing continues.
      My Computers

  6. hsehestedt's Avatar
    Posts : 2,283
    Windows 10 Pro, 20H2
       #6

    dave12cd said:
    Yes the issue only happened with a cold boot. I have switched off Fast Startup so will see how we go. Thanks.
    Very interesting. Do let me know how it goes. The Fast Startup can be annoying at times. I setup all my systems for Wake On LAN and Fast Startup also needs to be disabled for that to work so it's disabled on all my systems.
      My Computers

  7. Steve C's Avatar
    Posts : 6,533
    Windows 10 Pro 64 bit
       #7

    dave12cd said:
    Yes the issue only happened with a cold boot. I have switched off Fast Startup so will see how we go. Thanks.
    Note there is also a Fast Boot option in the BIOS. I would disable that too.
      My Computers

  8. hsehestedt's Avatar
    Posts : 2,283
    Windows 10 Pro, 20H2
       #8

    Steve C said:
    Note there is also a Fast Boot option in the BIOS. I would disable that too.
    Steve makes a good point. You might try disabling one at a time though so that you can really isolate whether one in particular is causing you difficulties while the other may not.

    I was paying attention only to Windows Fast Startup because the manner in which it operates is simply more prone to causing potential issues.

    In case you are interested in knowing a little bit more about what Fast Startup actually does, here is an article that does a pretty good job explaining how it works:

    The Pros and Cons of Windows 10’s “Fast Startup” Mode (howtogeek.com)
      My Computers


  9. Posts : 19
    Windows 10 Home
    Thread Starter
       #9

    dave12cd said:
    Yes the issue only happened with a cold boot. I have switched off Fast Startup so will see how we go. Thanks.
    I am afraid the same problem happened this morning, and here was me hoping that switching off Fast Startup was the answer. As that was not the problem should I switch that back on?

    - - - Updated - - -

    Steve C said:
    Did you check the voltage of the new CMOS battery was over 3V and load the BIOS defaults?

    I had a similar issue due to a faulty power supply which did always supply the required +5V standby power line required to boot the PC when the on button is pressed. I eventually had to replace the PSU.
    The PSU should generate a +5V standby output to the motherboard at all times when the PC is off and the PSU is turned on at the mains. Pressing the PC power on button causes the motherboard to send a power on signal to the PSU (derived from the +5V standby power line). The PSU should then respond by outputting the correct voltages on all rails and sending a Power Good signal to the motherboard when the voltages have stabilised - this usually takes 0.1-0.5 sec.
    How would I check this? I bought a brand new CMOS battery, as when I used one I had lying around the problem was still there. With the brand new battery I am still getting the same issue.

    - - - Updated - - -

    RJARRRPCGP said:
    Suspect bad caps in the PSU, if the same thing continues.
    Sorry, what are "bad caps in the PSU" and what do I do about them?

    - - - Updated - - -

    hsehestedt said:
    Steve makes a good point. You might try disabling one at a time though so that you can really isolate whether one in particular is causing you difficulties while the other may not.

    I was paying attention only to Windows Fast Startup because the manner in which it operates is simply more prone to causing potential issues.

    In case you are interested in knowing a little bit more about what Fast Startup actually does, here is an article that does a pretty good job explaining how it works:

    The Pros and Cons of Windows 10’s “Fast Startup” Mode (howtogeek.com)
    I have now disabled Quick Boot in the BIOS, so will see how that goes. Fingers crossed?
      My Computer


  10. Posts : 415
    Windows 10 Home 21H1 x64
       #10

    dave12cd said:



    Sorry, what are "bad caps in the PSU" and what do I do about them?
    Bad capacitors:

    https://badcaps.net
      My Computers


 
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