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820-3330 Graphics issue

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  • 820-3330 Graphics issue

    No liquid damage. Tested another LCD, Reballed VRam, Resoldered and replaced U8900. Just looking for confirmation its a dead GPU?

  • #2
    Very well could be. Reball the GMUX just in case

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    • #3
      Never seen a MUX do that. If it really has been worked on that much, you can't rule out damage to the board itself. Of course, GPU highly suspect, as it damage near/around it...inspect entire board very well for missing/damaged components.

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      • #4
        Can you access OSX?
        If yes, switch to iGPU and see what happens...

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        • #5
          It crashes when booting

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          • #6
            Reflash BIOS with clean ME.
            If still the same, then should be GPU...

            BTW, external video same?
            If yes, then is not GMUX.

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