Lenovo Laptop Showing No Display

lovafo on 22/10/2024 - 17:37
Last edited 22/10/2024 - 18:03 by 1 other user

Hi all, I have a Lenovo IdeaPad which recently showed an issue where after a few minutes of being on the screen will display distorted black and white pixels and connecting to a monitor shows the same. This happens at random times after turning the laptop on.

So today I decided to open the laptop up, unplugged the display cable and plugged it back in to see if that fixes the issue. Now the laptop has no display at all even when connected to a monitor. I've tried to unplug and plug the display cable in again multiple times without any success. Tried removing the battery, hard reset, drain the power etc same result

The laptop clearly turns on with and without the battery, so does that mean the motherboard is still good, but something has failed?

Thanks

Computing Computer Laptop Lenovo

Comments

  • freefall101 on 22/10/2024 - 17:42
    +1

    Sounds like it's toast. If it has a dedicated GPU that might be the issue, or it could be something like the soldering/port (what do you mean by "the display cable"?)

    What model is it?

    • lovafo on 22/10/2024 - 17:58

      it's an IdeaPad 3 14IIL05

      the display cable into the laptop screen

    • lovafo on 22/10/2024 - 22:19

      yes looks like the same issue as mine.

      I did try to change the RAM stick without any luck however after reading that post I removed the RAM stick and surprise surprise it works with external monitor now (even with 4GB onboard RAM).

      The laptop screen is still black but somehow under the desk lamp light I could see the display behind the laptop screen even though it's very very dim, almost black

      Obviously the RAM slot maybe the culprit here but why is the laptop screen still not (fully) working?

      • GordonD on 23/10/2024 - 15:55

        I'd surmise that neither the screen backlight or the RAM slot are getting power. Which is one step worse than the guy on reddit where it was only the RAM slot that wasn't getting power. Corrosion? Bad contact or joint? Cracked motherboard trace? Would have to see a circuit diagram to see what's common to make a guess.

        What you are seeing is the signals getting to the screen to create the image, but no backlight to illuminate that image from behind. And in terms of the RAM the video window would be stored in the RAM at the higher address, which would be the stick in the slot if its there, and the RAM on the motherboard if its not. So if the stick in the slot is not there it works.

        • lovafo on 24/10/2024 - 14:41

          pretty sure I've blown the display fuse while tinkering with the display cable. So now to replace that fuse I couldn't find anywhere I could buy a new fuse from, as I don't know anything about laptop fuses so are they mostly universal? can I just pull a fuse from one of the spare laptops I have and try?

  • El Grande on 22/10/2024 - 23:29

    There is a reset pinhole on my thinkpad. I had the black screen issue. I called support they asked me to unplug the laptop press it for 30 seconds and then turn it on. fixed it for me. Or better yet call them. Worst they can do is ask for money which you can decline if unreasonable.

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