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820-3462-A no green light

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  • 820-3462-A no green light

    I'm trying to figure out whats wrong with this board there's no green light
    PPBUS_G3H - Present
    PP3V42_G3H - Present
    SMC_RESET_L - Present
    SMC_DCIN_ISENSE - Missing
    SMC_BC_ACOK - Present
    PP5V_S5 - missing

  • #2
    Voltage on PPBUS_G3H???

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    • #3
      It's 12.28V

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      • #4
        SMC is not running. Was there corrosion around SMC?

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        • #5
          no corrosion around smc. how do i test it to be 100% sure that is the smc?
          Last edited by john; 12-13-2016, 06:43 AM.

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          • #6
            To be 100% sure you replace it with a 100% new one. None of that is possible so just replace it with one from a scrap board and pray that it works.

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            • #7
              I'm waiting for the stencil

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              • #8
                I replace the SMC and the fan is spinning I have a green light but there's no imagine and there's no chime. When I press the Shift+Control+Option I get a green light and then an orange one that means the SMC is resting. Is it something to do with CPU Vcore?
                PPVCORE_S0_CPU is 0.95V
                PPVCORE_S0_AXG is 0V

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                • #9
                  USB mouse lights up when plugged in?

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                  • #10
                    no light when I plug the mouse

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                    • #11
                      Where did your replacement SMC come from?

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                      • #12
                        Aliexpress from a board. Do I need to replace the SMC again?

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                        • #13
                          It could be anything at this point. All power is there so it could be a bad SMC. It could be the termination resistors in the U6100 data lines. Did the SMC come from an identical board?

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                          • #14
                            Yes it come from identical board. I place another order I'm waiting for it. Thanks

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