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  1. M

    U7000 CHGR_BGATE to Q7055 12v insteadof 5v

    After Removing D6950 & ISL6259: Pin 4 Diode Mode - .543 Pin 6 Diode Mode - 1.2
  2. M

    U7000 CHGR_BGATE to Q7055 12v insteadof 5v

    After Removing D6950: Pin 4 Diode Mode - .500 Pin 6 Diode Mode - .522 - Battery Still Not Detected Given the similar readings should I reinstall the D6950? & Should I begin to chase down the cause of .522?
  3. M

    U7000 CHGR_BGATE to Q7055 12v insteadof 5v

    I learn something new everyday -- thank you. Pin 4 Diode Mode - .502 Pin 6 Diode Mode - .524 CHGR_A/BMON voltages, with both charger and battery connected: CHGR_AMON - .339V CHGR_BMON - .068V
  4. M

    U7000 CHGR_BGATE to Q7055 12v insteadof 5v

    Yes Sorry I am still relatively new to board repair - Board is 820-2936-A Battery Bus Voltage while On / Plugged In Pin 1 - 0V Pin 2 - 0V Pin 3 - 0V Pin 4 - 3.4V Pin 5 - 0V Pin 6 - 3.4V Pin 7 - 11.29V Pin 8 - 11.29V Pin 9 - 11.29V Battery Bus Resistance to Ground (Battery Not Connected) Pin...
  5. M

    U7000 CHGR_BGATE to Q7055 12v insteadof 5v

    CHGR_BGATE to Q7055 12v insteadof 5v Q7055 Output (Pin 5) 11.29V Everything works on machine, just does not recognize or charge battery Should I Replace U7000 or should I check other things first?
  6. M

    A1466 820 3437 Board No Power , No Chime, No Fan Spin

    R7311/21 = 4.8V C7311/21 = 4.8V U7310 Pin 8 (Phase) is getting the same .46V as PPVCC_S0_CPU These readings do not match my known good board. Is this a step in the right direction?
  7. M

    A1466 820 3437 Board No Power , No Chime, No Fan Spin

    Power rails measure normal, am getting .46 V on PPVCC_S0_CPU No visible corrosion but signs of water damage. Not sure how to diagnose low voltage on this line, how should I proceed? Thankyou!
  8. M

    A1466 Water Damage - General Troubleshooting Question

    Should I grab the : Crest Powersonic P500H-45 ultrasonic cleaner w/ mesh basket 1.5 gallon ?
  9. M

    A1466 Water Damage - General Troubleshooting Question

    Negative, I am still looking to order a proper ultrasonic for mac boards. Just have one for cell phone boards at the moment. What is the go to model for ultrasonic cleaning on mac boards?
  10. M

    A1466 Water Damage - General Troubleshooting Question

    Hello, I have an A1466 that had water damage - cleaned it out and everythings good - comes on normally. After 30 - 45 seconds complete freezes and have to force shut down. Tried recovery mode, alternate OS, etc all same so it points to hardware. What would main causes of this be , so I know...
  11. M

    Macbook Pro 820-3115 Logic Board with No Boot. Does have Green Light & Fan Spin

    Hello everyone, I am somewhat new to board repair. I can diagnose and repair certain power / back light issues on macbooks, ipads, iphones etc. but am still learning how to use schematics and multi-meter to efficiently diagnose and repair less common problems. I have this 820-3115 board here...
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