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    Macbook Pro a2159 820-01598 - Not Turning on, stuck at 5v

    My bad. Yes I took the diode readings without power from charger or batteries. I was doing the readings on test pads, should I have been on caps instead? Pardon my ignorance again... If it is either T2 or U7800, is there some way I can narrow it down to one or the other? Do people often...
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    Macbook Pro a2159 820-01598 - Not Turning on, stuck at 5v

    Appreciate the insight, I was definitely overthinking that. I took some diode readings and here are my results: L7810 (PPVDDCPUSRAM_AWAKE) 0.390 L7811-L7812 (PP0V82_SLPDDR) 0.000 L7809-L7808-L7807-L7806 (PPVDDCPU_AWAKE) 0.000 L7813 (PP1V8_SLPS2R) 0.000 L7814-L7815 (PP1V1_SLPS2R)...
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    Macbook Pro a2159 820-01598 - Not Turning on, stuck at 5v

    Just asking for a mild clarification, when you say coils, are those inductors? I'm assuming I should be checking the L78... series coils, but I just wanted to make sure because they are under some kind of metal shield. (If you have any pointers for removing this I'd also appreciate it because...
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    Macbook Pro a2159 820-01598 - Not Turning on, stuck at 5v

    Thanks for the quick response! Glad to learn that I didn't waste my time trying to solder jumpers for manual DFU access. Just got back in the office, doing a diode mode to ground test netted in a reading of 0.000.
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    Macbook Pro a2159 820-01598 - Not Turning on, stuck at 5v

    Greetings, I just wanted to preface this by saying I'm quite novice when it comes to motherboard repair and have been cutting my teeth with this board for the past week or so. I work in an I.T. department and fixes like this are outside of our scope usually so I don't have any assistance with...
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