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820-00281 No Power

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  • #16
    I don't think to be SMC.
    In fact it detects a problem and stops the board; some sensor triggers it.
    Instal HWMonitor and look for strange I/V, or temp values.
    Last edited by 2informaticos; 6 days ago.

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    • #17
      Well I thought i'd have a go and reflow SMC anyhow - board now powers up in normal mode but not with battery connected. Looks like i've got a dead battery as well.

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      • #18
        Is the battery recognized at least?
        Which is exact PPBUS_G3H voltage?
        Post diode mode and voltage at SCL/SDA lines of battery bus.

        I also recommend to reball SMC, if reacted to reflow.
        You had a bad contact for some SMC sensor line...

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        • #19
          PPBUS_G3H Without Battery - 12.61V

          System will not start with battery connected but if I connect it after turning system on it recognizes it and says 2% not charging. Also PPBUS_G3H Voltage slowly raises from 12.61v up to 13.02V with the battery attached.

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          • #20
            Try known good working battery for test.
            Looks like bad battery now...

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            • #21
              With new battery all working perfectly so mark this one as resolved.

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