Blank screen before Login

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  1. Posts : 18
    Windows 10
       #1

    Blank screen before Login


    I've been using window 10 since day one and did a clean install 11/14/19. Started have problems around 6/20/19 upgrade.

    Now using Windows 10 1909 V 18363.657. It keep getting a blank/black screen before I can see login screen. If i hit my rest button to reboot "once", I can usually get logged in, then my PC works great. However if I have to restart Bios again for a second blank screen, (this doesn't happen all the time), but my bios UEFI at boot. gets disabled. Once I go into bios with F2 key and enable UEFI on startup, then after bios completes (with no blank screen at all.)

    If I shut down my pc the cycle starts with a blank screen again. This is ward!
    I'm having others sleep problems but I address them when this is fixed.

    My PC is old, Intel MB DZ68BC , Nvidia Geforce GTX 560 Ti card, Intel network adapter 82579V.
    I'm using the last version of Intel bios, which no longer supports.

    Also tried all the MS fixes for this and nothing helped.

    I don't know if I can flash bios or the mothers board to fix this. Need instructions for this.
      My Computer

  2. PeterPan2000's Avatar
    Posts : 58
    Windows 10 pro, 64 bit
       #2

    Quite often when I've found odd setting losses in my bios, the CMOS battery was dying, but not completely dead. I have some old machines too, and am amazed that their motherboards don't have the sense to even let me know. When I find my bio time clock has reverted to January 1970, then its obvious. But before it gets to that point I've see things like the on-board sound support or boot order change.

    Anyway, try shutting down, pulling the plug, and changing the battery. Then check all your bios settings and see if the problem stops happening.
      My Computer


  3. Posts : 18
    Windows 10
    Thread Starter
       #3

    Thank you Peter Pan 2000.
    Are you saying you cmos battery died? It having with a date of Jan 1970? I'll look at this but, if I recall my bios clock is right on time.
      My Computer


  4. Posts : 52
    Windows 10 64 bit
       #4

    It does not matter if the BIOS clock is on time I would just change the CMOS battery at first sign of Mobo problems (if you service multiple computers I would keep a few handy as they are only around $2 CAD ($1.59ish USD)
      My Computers

  5. PeterPan2000's Avatar
    Posts : 58
    Windows 10 pro, 64 bit
       #5

    Jim177 said:
    Thank you Peter Pan 2000.
    Are you saying you cmos battery died? It having with a date of Jan 1970? I'll look at this but, if I recall my bios clock is right on time.
    The clock resetting is one sign that the cmos battery is totally dead. But before it dies totally it can play weird tricks, like losing one or two settings. Modern machines can detect the battery failing, but older machines are hit and miss.
      My Computer

  6. Steve C's Avatar
    Posts : 6,291
    Windows 10 Pro 64 bit
       #6

    Could well be the CMOS battery. Remember to load the BIOS defaults then make your own settings.
      My Computers


  7. Posts : 18
    Windows 10
    Thread Starter
       #7

    CMOS Battery


    Thanks guys,
    I live in a rural area and my CMOS Battery will be here shortly. It is really strange though that it only effects the UEFI enable and disable switch and nothing else.

    Do I have to worry about any loss of bios if I can change it out in a few minutes after removing the power cord from my PC? I looked at the manual any thing about data loss. And it looks like it's easy to replace, I just need a small flat screw driver to pop the old one out.
      My Computer

  8. Steve C's Avatar
    Posts : 6,291
    Windows 10 Pro 64 bit
       #8

    Jim177 said:
    Thanks guys,
    I live in a rural area and my CMOS Battery will be here shortly. It is really strange though that it only effects the UEFI enable and disable switch and nothing else.

    Do I have to worry about any loss of bios if I can change it out in a few minutes after removing the power cord from my PC? I looked at the manual any thing about data loss. And it looks like it's easy to replace, I just need a small flat screw driver to pop the old one out.
    Removing the CMOS battery should cause it to set the defaults. Set these anyway when you power on, check the PC boots then go back and set your preferences. I hope you noted your preferred settings.
      My Computers

  9. PeterPan2000's Avatar
    Posts : 58
    Windows 10 pro, 64 bit
       #9

    Jim177 said:
    Thanks guys,
    I live in a rural area and my CMOS Battery will be here shortly. It is really strange though that it only effects the UEFI enable and disable switch and nothing else.

    Do I have to worry about any loss of bios if I can change it out in a few minutes after removing the power cord from my PC? I looked at the manual any thing about data loss. And it looks like it's easy to replace, I just need a small flat screw driver to pop the old one out.
    Well before you change it, it might be good to write down (or just take a photo) of the CMOS screens. As far as losing things, the answer is "maybe". Motherboards usually have a large value capacitor that will hold a charge for a short while. Thats why BIOS resets require both removing the battery AND shorting a pair of nearby pins. My experience is that if you snap out the old battery and replace it within a short time, the existing bios settings will often remain. But how fast? Hard to say... I usually can change the battery in less than 5 seconds. And, if the existing battery was weak, that might lower your chances too. So record your settings, make the switch fast, and hope for the best.
      My Computer


  10. Posts : 18
    Windows 10
    Thread Starter
       #10

    CMOS Battery


    Well, the Cmos Battery has been replaced, but I still have a black screen on startup. If I reset the Desktop PC once I get to the screen where I can login after hitting the space bar once. I took some pics of the Bios settings on my iPad but I have to figure out how to transfer them to Windows. I'll forward them if that will help.
      My Computer


 
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