MBA13 M3 2024 A3113 EMC8611 820-03285 No Trackpad No Keyboard (water damaged)

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  • guzq
    Senior Member
    • May 2017
    • 54
    • Indonesia
    #1

    MBA13 M3 2024 A3113 EMC8611 820-03285 No Trackpad No Keyboard (water damaged)

    Hi Guys,

    This Mac come with dead issues (severe water damage), now it’s turning ON except Trackpad and Keyboard not working.

    Already check and write down DM for JT400 and JT201 don’t find any abnormal value (I don’t have unit for compare).

    Already try,
    • Replacing Trackpad Flex Cable
    • Replacing New Trackpad
    • Replacing Little Board (Daughter Board)
    • Try using New Keyboard
    Still no change at all, Trackpad and Keyboard not working.

    So I check “Power Load Switches” and this is all the numbers,
    UC830 > 1 = 3.297V ; 3 =1.757V ; 4 = 3.798V
    UC840 > 1 = 0V ; 2 = 1.878V ; 3/4 = 5.187V ; 5 = 5.187V ; 6 = 0V ; 7 = 0V
    UC850 > 1 = 0V ; 2 = 1.796V ; 3/4 =12.56V ; 5 = 12.56V ; 6 = 0V ; 7 = 0V
    UC860 > 1 = 0V ; 2 = 0V ; 4 = 0V ; 5 = 1.798V
    UC870 > 1 = 1.801V ; 2 = 1.798V ; 4 = 1.797V ; 5 = 1.798V

    Now I hit dead-wall what should I check next ?



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