How can a malfunctioning gtx 1080 on a GX-792-783M be fixed or switch to iGPU?

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Sub24
Sub24 Member Posts: 6

Tinkerer

As of recently my laptop shows horizontal 1 pixel tall lines. From what I found on the net, it looks like GPU or VRAM artifacts. They are present throughout all of the different loading/boot screens.

Device manager shows one GPU (1080) which is not working properly due to code 43 error. My CPU (i7-7820HK) should have an integrated 630m gpu but it doesn't show. It might be disabled from BIOS which I tried to enable but I cannot see anything due to full-screen artifacting (entire screen is noise pixelated).

For clarification, most of the screen looks normal but there are multiple horizontal lines when windows has loaded. When in Bios, the entire screen is bad and nothing can be seen.

My question is, is there a way to switch to the igpu from within windows? Does any of the ports receive signal from the igpu which can be used for some workaround fix? Is there a way to access and interact with the bios if I can't see anything on the laptop display? What are my options and potential repairs of the laptop?

Answers

  • Sub24
    Sub24 Member Posts: 6

    Tinkerer

    A motherboard schematic diagram might also provide me some help.

  • AnhEZ28
    AnhEZ28 ACE, Member Posts: 5,113 Pathfinder

    @Sub24

    Here is the system block diagram. It seems that the Nvidia GPU is responsible for the laptop panel, DP, and HDMI connection.

    image.png

    In the BIOS, there is no option to switch to the Intel GPU.

    image.png

    So it is likely that there is no way to enable the Intel GPU in this model. You can bring the laptop to a repair shop that specializes in GPU or motherboard repair.

    Please remember to include @AnhEZ28 when you want to reply back to my comment so that I can check your response.
    Thank you and have a nice day!
  • Sub24
    Sub24 Member Posts: 6

    Tinkerer

    I've already contacted several repair shops. Most of them say it's highly likely a gpu crystal problem / dead gpu, however, without a proper diagnostic. They also mentioned that it is highly likely that a new motherboard will be required (with cpu and gpu), which is a decent amount of money...

    Could it be that the issue originates from a faulty VRAM chip and is that easier and more budget friendly for fixing?

    Here is how my desktop looks:

    IMG_20240513_172907.jpg
  • AnhEZ28
    AnhEZ28 ACE, Member Posts: 5,113 Pathfinder

    @Sub24

    Yes, it looks really bad right now. The most common fix for this issue is to reflow the GPU chip, but this has a 50-50 chance of saving the laptop or nothing.

    For checking the VRAM, you will need diagnostic software like the video below that you can check out.

    Please remember to include @AnhEZ28 when you want to reply back to my comment so that I can check your response.
    Thank you and have a nice day!