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Lenovo Legion Y540 burned PCB repair

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    Lenovo Legion Y540 burned PCB repair

    Hello,

    I'd like to ask someone more experienced than me for advice - I'm trying to repair this Legion Y540 with a burnt mosfet (PU3001) through the PCB (damaged/shorted capacitor was also on the other side).

    I am able to drill out the damaged part of the PCB, repair the surface paths and solder the components according to the available Board view data, but it is very difficult to find out if some internal paths are broken.

    1) Any chance there is/will be CAD documentation available for the PCB layers for this Lenovo, such as for example for the Dell E7470 (.brd file openable in Allegro Free Physical Viewer)? (https://www.badcaps.net/forum/troubl...7-need-brd-for -dell-la-c461p)

    2) Is there any theoretical chance that there are no internal paths in this particular damaged spot on the PCB?

    3) I will be grateful for any suggestions.

    Thank you!

    Click image for larger version  Name:	IMG_20240719_195138.jpg Views:	9 Size:	5.80 MB ID:	3314204 Click image for larger version

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    Last edited by raill; 07-22-2024, 08:47 AM.

    #2
    Not much point wasting time here. CPU will be dead, and in my opinion PCB damage is too extensive to be rebuilt reliably.
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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      #3
      Thank You, although this is not very optimistic news

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