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820-00138 turns on, battery error symbol, then turns off. Works fine in SMC bypass

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  • 2informaticos
    replied
    Check the board alone on the desk, without any perypheral.
    If works, then start to connect things one by one...

    Leave a comment:


  • JohnB8812
    replied
    The keyboard is resetting the SMC....does it turn on with the keyboard and trackpad disconnected????

    Leave a comment:


  • kevinklinkmuller
    replied
    tried another SMC, dead only charging light comes on. interestingly when i press the power button the light goes from orange to green then back to orange
    gonna check voltages now

    Leave a comment:


  • kevinklinkmuller
    replied
    ok will check soon thanks!

    Leave a comment:


  • 2informaticos
    replied
    SMC is compatible, but you can't be 100% sure got a good one from scrap board...

    Check again basic signals.
    Be sure SMC is properly soldered; check for moved, or knocked off components.

    Leave a comment:


  • kevinklinkmuller
    replied
    Hi there! Revisiting this today. Bought donor board and have reablled SMC from a 820-00138-a board but I noticed the board i'm repairing is 820-00138-05

    have tested that SMC and while I get the orange / green light and while the light turns screen when i try SMC bypass, it's not doing anything more than that

    Will these SMC's work?

    Leave a comment:


  • 2informaticos
    replied
    "I can't find SMC_AVREF"
    PP3V3_S5_AVREF_SMC to be more specific.

    "I guess you're going to tell me now that the programming is different"
    Exactly!!!

    Leave a comment:


  • kevinklinkmuller
    replied
    Actually, it wasn't from the same model donor. the chip has the same markings. I guess you're going to tell me now that the programming is different hahaha

    I can't find SMC_AVREF in the schematic or board view

    Leave a comment:


  • 2informaticos
    replied
    Did you get it from same model donor board?
    Machine should start in SMC bypass, as before.
    Something went wrong in the process, or SMC is bad/incorrect.
    Also check SMC_AVREF voltage.

    Leave a comment:


  • kevinklinkmuller
    replied
    Ok so I did a nice reball on a new SMC and green light is back BUT it doesn't boot in bypass mode.

    faulty SMC?

    Leave a comment:


  • 2informaticos
    replied
    At least at the last point before the "tsunami"
    Or even better, in case if SMC was the culprit; which I doubt...

    Leave a comment:


  • kevinklinkmuller
    replied
    thank you! Going to reball an SMC and put that on next week. that should bring me back to where i started right?

    Leave a comment:


  • 2informaticos
    replied
    Every day can learn a lesson; but sometime can be pricely...
    Next time when you use bench power supply, set it at 3V and go high to nominal voltage after Magsafe is correctly connected.

    Leave a comment:


  • kevinklinkmuller
    replied
    I used a bench power supply. Damn!!!!!

    Leave a comment:


  • 2informaticos
    replied
    I don't think that.
    Something else happened there.
    Unless you used fake charger, which gives full voltage always.
    Original Apple Magsafe 2 gives only 3V at the first moment, before the board is detected correctly.
    Bench power supply also can generate such kind of problem.
    Last edited by 2informaticos; 01-28-2019, 10:08 AM.

    Leave a comment:

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