1. VaderLovesCookies

    OP VaderLovesCookies Newbie
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    My first post.
    I am coming from repairing mostly MacBook Airs.
    This is my first attempt at a Switch repair.

    This unit won't turn on.
    No water damage:
    Drawing 40mA when plugged in.

    I found one cap short near ALC5639.
    This is a Realtek audio chip correct?
    I am not sure if this is a related issue to the power on or not.
    I will have to order a chip as I don't have a donor board.
    Could this cause a power on issue?
    I am planning on removing the ALC5639 and seeing if this short resolves.

    I have already checked the USB connector continuity, it looks good.

    However, near MAX77620H I found a bunch of short CAPS
    The large ones are inductors so I assume those are good but 2-3 caps are short
    See the image below.
    This is a power management IC correct?
    I was going to order a new chip for this one as it seems to be the responsible IC.




    I was expecting the issue to be at the charging chip/M92T36

    The Nintendo Checks.pdf document I found does reference that the ALC5639 has some direct input from M92T36.

    Any assistance would be much appreciated.
     

    Attached Files:

    Last edited by VaderLovesCookies, Sep 23, 2020
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  2. iolo57

    iolo57 Newbie
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    Hello,
    I have the same problem . Have you found the solution? I also thought of the MAX77620H or the MAX77812.
     
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  3. Chronos94

    Chronos94 Newbie
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    Somebody found the solution?
     
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  4. Alfixes

    Alfixes Member
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    How did you measure shorts? Diode mode with red probe on the ground? To op i think short on the left is normal but not on other capacitors. Perhaps try to remove max ic and measure again.
    Inductors (bigger size) are continuous so "short" is desired on them.
     
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  5. lpoolm

    lpoolm GBAtemp Fan
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    Does anyone have further input on this issue, I have recently got a switch with similar issues.
    Thanks
     
  6. MaxToTheMax

    MaxToTheMax GBAtemp Regular
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    Usually, shorts on caps mean that the charging chip is bad. Have you check that chip? it should be labeled "M92T36"
     
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  7. lpoolm

    lpoolm GBAtemp Fan
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    My m92t36 has no shorts, but the chip next to it has one.
    I have recently watched a video by northridge fix who has the same short on that chip and found it to be a bad diode.
    I've not had chance to remove that diode yet but hopefully removing that could help?
     
  8. MaxToTheMax

    MaxToTheMax GBAtemp Regular
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    It definitely might. Let us know how it goes
     
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  9. lpoolm

    lpoolm GBAtemp Fan
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    Took the diode off before, same short, very annoyed!
    Back to basics..
     
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  10. MaxToTheMax

    MaxToTheMax GBAtemp Regular
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    Damn dude, I'm sorry
     
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