What to do with a black screen?

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  1. Posts : 113
    Windows 10 & Ubuntu Studio
       #1

    What to do with a black screen?


    Laptop: Lenovo IdeaPad Flex 5, Aug 2020
    Even the F2 won't work to access the BIOS, nor the F12 won't work to bring up the EFI menu. I also tried using a Live USB stick with rEFInd - a booting manager - but that didn't work either.

    What else can I try?
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  2. Ghot's Avatar
    Posts : 15,938
    Win 10 Home 10.0.19044.1469 (x64) [21H2]
       #2

    drpeppercan said:
    Laptop: Lenovo IdeaPad Flex 5, Aug 2020
    Even the F2 won't work to access the BIOS, nor the F12 won't work to bring up the EFI menu. I also tried using a Live USB stick with rEFInd - a booting manager - but that didn't work either.

    What else can I try?



    Hook another monitor or TV to the laptop, see if that works.

    Check the ribbon cable going to the screen (internal).
    Re-seat the RAM.
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  3. spunk's Avatar
    Posts : 3,576
    Windows 11 Pro 64 Bit 21H2
       #3

    When you turn on the laptop if there are no lights or fans spinning, then the laptop is not powered up, bad battery, or wrong power adapter plugged in, or the motherboard has failed.
    If the fans are spinning etc, then as stated try an external monitor or TV
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  4. Posts : 113
    Windows 10 & Ubuntu Studio
    Thread Starter
       #4

    Ghot said:
    Hook another monitor or TV to the laptop, see if that works.
    Check the ribbon cable going to the screen (internal).
    Re-seat the RAM.
    I plugged a monitor with an HDMI cable but the black lit up screen continued showing on the laptop, not the monitor. It's not a 100% plain black. The screen seems to work, except that it's mostly showing a black hue. Still, I don't know why the monitor wouldn't show it. Isn't it just a matter of plugging the HDMI cable from the laptop to the monitor?
    The keyboard did lit up, as well the tiny light on the power button. I don't think I heard fans.
    I guess I'll find out how to open it to check the ribbon cable as you advised.
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  5. Ghot's Avatar
    Posts : 15,938
    Win 10 Home 10.0.19044.1469 (x64) [21H2]
       #5

    drpeppercan said:
    I plugged a monitor with an HDMI cable but the black lit up screen continued showing on the laptop, not the monitor. It's not a 100% plain black. The screen seems to work, except that it's mostly showing a black hue. Still, I don't know why the monitor wouldn't show it. Isn't it just a matter of plugging the HDMI cable from the laptop to the monitor?
    The keyboard did lit up, as well the tiny light on the power button. I don't think I heard fans.
    I guess I'll find out how to open it to check the ribbon cable as you advised.


    When you hooked up the other monitor, did you get an image of any kind?
    Also... on the "other" monitor you hook to the laptop, make sure you set that monitor's input for HDMI, or w/e cable you used.
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  6. Posts : 113
    Windows 10 & Ubuntu Studio
    Thread Starter
       #6

    Ghot said:
    When you hooked up the other monitor, did you get an image of any kind?
    No, I don't
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  7. Ghot's Avatar
    Posts : 15,938
    Win 10 Home 10.0.19044.1469 (x64) [21H2]
       #7

    Let's say you hooked up a 2nd monitor properly, and that the cable you used is good.
    Then you should be able to get into the BIOS on the 2nd monitor.

    If you can't... then there is something wrong with w/e "makes" the image.
    That could be the grfx card, or CPU, or RAM that needs re-seated, or a bad motherboard, etc.

    If you can get into the BIOS on the 2nd monitor, then that indicates that there is a problem with the laptop screen or the ribbon cable that supplies the image to the laptop screen.
    Last edited by Ghot; 25 Nov 2021 at 22:57.
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  8. spunk's Avatar
    Posts : 3,576
    Windows 11 Pro 64 Bit 21H2
       #8

    Make sure you are using the correct Power Adapter for the laptop and that it is plugged directly into the wall.
    There is no need to reseat the ribbon cable to the laptop monitor if the secondary monitor doesn't work.
    If you don't hear fans spinning then that is a sign of a hardware malfunction. The GPU Graphics "card" is soldered onto the motherboard, so if nothing works, chances are great the motherboard has failed.
    If you are brave and want to open it up and reseat the RAM, here is a video how
    Lenovo Ideapad Flex 5 14ARE05 81X2 Disassembly SSD Hard Drive Upgrade Battery Replacement Repair - YouTube
      My Computer


  9. Posts : 113
    Windows 10 & Ubuntu Studio
    Thread Starter
       #9

    spunk said:
    If you are brave and want to open it up and reseat the RAM, here is a video how
    Lenovo Ideapad Flex 5 14ARE05 81X2 Disassembly SSD Hard Drive Upgrade Battery Replacement Repair - YouTube
    Thank you for the video spunk, I might muster the energy and confidence to try it.
      My Computer


  10. Posts : 481
    W10
       #10

    I had it once with a desktop PC. I brought it to a repair shop.
    Replacement of battery; no effect
    Replacement of video card: no effect
    Flashing of the BIOS: solved the issue.
    A replacement of hardware parts was not needed.
      My Computer


 

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