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    820-00281-A 2017 15" MBP Fan Control Transistor Q6000 broken, doesn't work after resoldering

    I have a 2017 15" MacBook Pro motherboard (820-00281-A) where the transistor in the fan control circuit (Q6000) accidentally got broken off the motherboard while doing a board swap into a new topcase. Result was that when I turned the computer on, the left side fan would run continuously full...
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    820-00840-A (2017 13" MBP) PPBUS_G3H at 1.1V, USB at 20V but 0.04A flowing, No Power or Charge

    I have a 2017 13" MacBook Pro motherboard (model 820-00840-A) that won't turn on. I measured the PPBUS_G3H line with a USB-C charger connected, and get around 1.08V (instead of 12V?). No short to ground in this line - resistance measures 1K ohms rapidly increasing to infinity. Fuses F3000 and...
  3. V

    A2141 820-01700 No LCD Backlight; 55 ohms between PPVOUT_S0_LCDBKLT and ground

    Also none of the capacitors look strange at all.
  4. V

    A2141 820-01700 No LCD Backlight; 55 ohms between PPVOUT_S0_LCDBKLT and ground

    Alright, I'll try that. What's a good voltage to start with, to inject after removing L8452? Also, when I desolder the capacitors, what temperature do I need to keep the hot air machine at, and what distance away from the board is best?
  5. V

    A2141 820-01700 No LCD Backlight; 55 ohms between PPVOUT_S0_LCDBKLT and ground

    Hello, I have a 2019 16" MacBook Pro (A2141) with no LCD backlight (the laptop does power on, boot to macOS and display stuff on the screen, but the backlight is off so you have to shine a light at the screen to see anything). I tested the PPVOUT_S0_LCDBKLT line at the terminals of L8452 and...
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