MacBook A2251 waterdamage

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  • Jenzo
    Senior Member
    • Jul 2019
    • 135
    • Belgium

    #1

    MacBook A2251 waterdamage

    Hey everyone,

    Working on a A2251 that was left out in the rain, and afterwards plugged into power :') Motherboard is a 820-01949

    Anyway, when cleaning up the corroded areas I took off the U3100 (_R) to check for underlying damage since the whole area is trashed, I saw that pad number 111 is completely gone, but I have no idea what it's used for. I can read of the schematic that it's line NC_UPC_R_I2C_ADDR, but what is this line's purpose, and is it required to boot the macbook since we're mainly going for data?

    TL;DR: What is NC_UPC_R_I2C_ADDR, and is it needed to boot the macbook?

    Including both boardview and schematic.

    Thanx in advance!
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  • Jenzo
    Senior Member
    • Jul 2019
    • 135
    • Belgium

    #2
    Re: MacBook A2251 waterdamage

    After replacing U3100_R, the other 3 ports take 5v 0.25a, and the corresponding port to the CD3217 that I replaced is taking 5V 0a.


    G3H is at 12.23v

    I have no experience with CD3217 machines, so not sure where to take it from here. Anyone have some advice?

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