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  1. O

    820-00840-A Power Issue

    Thank you for your guidance.
  2. O

    820-00840-A Power Issue

    Hi! The PCH die is heating one.
  3. O

    820-00840-A Power Issue

    Hi! CPU heatsink is removed. One of the dies I think is warmer than it supposed to be. CPU is dead? Thank you for your answer.
  4. O

    820-00840-A Power Issue

    Hi! I tried to locate the short but I can't find which one is. It is somewhere around C8233 where the heat comes from. I tried to use the alcohol method and the thermal camera method but the whole area is heating up. Also the CPU is getting hot by the time because that is on the other side. I...
  5. O

    820-00840-A Power Issue

    Hi! Short is on L7690 pin 1.
  6. O

    820-00840-A Power Issue

    Hi! Sign of liquid around U7650 L7670 is .416 L7690 is .001 pin12:0V pin13:0V pin21: 0V pin22: 3.3V pin23: around 0.5V pin29: 0V Edit: Looks like the pin23 is damaged by corrosion. There is 13.05V on c7650 capacitor. Also the PP3v3_S5 rail is shorted.
  7. O

    820-00840-A Power Issue

    Thank you for your answer. I checked them and no luck, 0V on all of those.
  8. O

    820-00840-A Power Issue

    Hi! I would like to ask for assistance in a 820-00840-A board. I'm more like into iPhone repair but I had some success in older Macbook repairs. This is not a customer board, it is for me to entertain myself in this hard covid times... I think I found a rabbit hole but I would like to ask for...
  9. O

    [SOLVED]820-3476 only operating on battery

    The measurements was fine, and the resistors was the problem!!! I love you from the bottom of my hearth. Thank you very much for helping me out.
  10. O

    [SOLVED]820-3476 only operating on battery

    Hey there! Without battery (original 85W adapter): When the board is powering on PPBUS_G3H is 12.6V When shuts off itself then 3.6V after a sec it’s starting again to turning on with 12.6V then shuts off and 3.6v. With battery: Dropping from 12.8V to around 5V, going back to 12.8V dropping...
  11. O

    [SOLVED]820-3476 only operating on battery

    I checked it, 17/18 is 28 ohm, 27/28 is 0 ohm. Should be around 20 ohm and 3 ohm ?
  12. O

    [SOLVED]820-3476 only operating on battery

    Thank you for your answer. Green light that turns orange is present. I'm going the measure the resistances tomorrow and answer your question about that. (different timezones)
  13. O

    [SOLVED]820-3476 only operating on battery

    Hello guys! I have a water-damaged 820-3476 which only can work when the battery IS attached. History: All it could do before was a loud fan spin, nothing more. I cleaned the board, replaced some SMD's and ISL as well around that area. I found corrosion under U8030 and jumped pin2 to C8010. The...
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