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820-2850 Kernel Panic (go figure)

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  • 820-2850 Kernel Panic (go figure)

    I have an 820-2850 experiencing kernel panic,

    As you have recommended online I replaced C9560 with Poly Cap, scaped pads to fit larger cap, everything went well, no excessive heat required, no other parts burned;

    Since replacing, I cannot get board to turn on;

    I have PPBUS_G3H, PP3V42 (and green light), and all S5 rails

    L9560 to gnd presents 110ohms, I noticed in diode mode there is only 0.07 drop from L9560 to gnd which is pin 7 of Q9560. Schematic shows diode here so I expect to see .6 ish v drop.

    Not sure is maybe I messed up q9560 but can see how it would prevent turn on if no short present.

    I was careful to no allow mush heat near CPU, however its likely some flux/alcohol got under it, I applied a slight amount of heat so flow/dry anything under CPU but no where near enough to reflow the CPU.

    Any Idea's?

    BTW - Have been watching your utube vid's, great stuff, thanks

    Bruce

  • #2
    Are you using a REAL 85W charger?

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    • #3
      Yes. It worked fine prior to C9560 replacement.

      Comment


      • #4
        Wow, just tried another Flapple 85w charger and low and behold...FAN SPIN...Thanks

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        • #5
          So I am wondering, would I have seen Adapter Sence on One Wire if I had checked? I didnt think to try that since I had PP3V42

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          • #6
            All voltages will be normal, it will just not power on. It should power on from a battery though.

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