here is something strange...it can start with power supply and runs fine and can charge also but with 85waat magasafe it could not turn on and green led on and again off on magasafe i tried with other adapter also same any ideas from where i should start ......i changed battery charging ic also same result no sings of water damage.....mobo code is 820-3787-a
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Re: macbook pro retina 15inch a1398 power issue
Maybe an issue with R7012, around Q7010 circuit (shorted MOSFET, bad resistors or bad zener diode), or around Q7180 (shorted MOSFET or bad gate resistors).OpenBoardView — https://github.com/OpenBoardView/OpenBoardView -
Re: macbook pro retina 15inch a1398 power issue
If it starts on adapter, does the battery icon appear? You should first find out if it is a battery power problem or a battery communication problem.Comment
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Re: macbook pro retina 15inch a1398 power issue
it does not start with adapter it only turns on with power supplyComment
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Re: macbook pro retina 15inch a1398 power issue
can i get board view or schematicComment
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Re: macbook pro retina 15inch a1398 power issue
try ...
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Every donation made will go towards server fees and maintenance costs.Comment
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Re: macbook pro retina 15inch a1398 power issue
i checked around as mention above but circut is fineComment
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Hi everyone,
I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck — hoping someone here can shed some light.
🛠 Original Issue
The machine initially wouldn't negotiate 20V over USB-C — stuck at 5V.
Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.
I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.
⚠️ New Problem: One USB-C Port Only Works in One Orientation... -
Hallo everyone, my A1398 do not charging the battery and the battery also do not bin recognized. I did all the reset work, SMC reset and all the other reset options but nothing helped. on the SMC at pin 2 (DCIN) there are 20,4V coming in. at pin 16 (BGATE) which goes to the Q7155 Gate there are only 11,43V. at the pin 1,2 and 3 on the Q7155 (Source) there are 12,23V. Cap C7126 is not shorted. As I understand, the gate voltege have to by higher then the source voltege for the gate to clous so the battery can be charging, am I right? can someone help me with this? I guess that manny models are working... -
Apple MacBook Pro 15 Retina A1398 EMC2910 820-00426 Boardview...10-26-2024, 04:08 AM
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Apple MacBook Pro Retina 15 A1398 820-3332-A Boardview...10-22-2024, 04:31 AM
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Apple MacBook Pro Retina 15" A1398 820-00138 051-00330 Schematic & BoardView...
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