I have this board Macbook 2016 model on PP3V42_G3H line. Is the board dead or what ? Earlier it was around 1.8 and now it is 14 V instead of 3.4 volt on L7095 . Please advise.
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Re: Macbook Air 820-00165 A 14 V on PP3V42_G3H
OMG. Probably toasted with such a high voltage but are you confident the reading is correct ?
Remove all power and check the voltage divider resistors @ R7095 & R7096. They must be the same value as shown in the circuits otherwise the downstream rail will get damaged.
These resistors define the 3v42 configuration. -
Re: Macbook Air 820-00165 A 14 V on PP3V42_G3H
Measure on the output of the inductor not the input.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Re: Macbook Air 820-00165 A 14 V on PP3V42_G3H
Can you confirm how you measured this rail ? The inductor has been recently damaged - after the measurement of 14v ??
The inductor (L7095) is not a critical component and can be replaced with any 2520 sized 10uh device. Often ferrite beads will work here but check their rated current before using. The rail itself is only 300mA but good idea to use 1A rated inductor or higher.
Perhaps you have a donor board or can borrow for testing ?
Then confirm the voltage rail @ L7095, pin # 2 as noted by @piernov.
In your repair, use lots of flux and watch how long the heat is applied onto the component if the heat setting is high. We use 550C on our clone Quick station (BEST Tools) but are cautious to not keep the heat on for too long on the component.Comment
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Re: Macbook Air 820-00165 A 14 V on PP3V42_G3H
The inductor is a critical part of the buck converter, it cannot be replaced by a ferrite bead.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Re: Macbook Air 820-00165 A 14 V on PP3V42_G3H
Meaning the style that is attached. A wire wound inductor is not required to be used for such low currents. SMD ferrite bead inductor can be applied.it cannot be replaced by a ferrite bead.Comment
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Re: Macbook Air 820-00165 A 14 V on PP3V42_G3H
The original inductor uses this kind of package. It is not the same thing as a ferrite bead used to filter high frequency noise though.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Hi everyone!
I have a 2018 MacBook Pro (with Sequoia OS) that I've been using for years with no problem. I recently received an M2 MacBook Pro so I'm mostly using it and not the 2018 one, but since a friend of mine needs a computer, I thought I could restore my 2018 and give it brand-new-like to my friend.
I tried using the built-in tool to restore the MacBook (Settings > General > Transfer or restore > Delete) but it got stuck when trying to remove the Find Device configuration (it asked me for the password for my old Apple ID -now I use the same account but...06-27-2025, 08:54 AM -
I am looking at an A2337 and found this for the order of power rails and what they do. Can this be confirmed before I dive into hunting down power rails that do not exist or are not neccisary?
- PPBUS_G3H (12.6V-12.8V)
- This is the main power rail that supplies power to the entire system. Check this rail first, as it must be present for other power rails to work.
- PP3V42_G3H (3.42V)
- This power rail is derived from PPBUS_G3H and is used to power the SMC (System Management Controller) and other essential circuits. It should be present if PPBUS_G3H is working correctly.
- PPVRTC_G3H (3.3V)
- This
- PPBUS_G3H (12.6V-12.8V)
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I’m working on one macbook air 15” m2 that was water damaged.
keyboard, lcd, microphone connectors were damaged so i’ve replaced all of them and without screen connected macbook worked fine. Keyboard &trackpad and also lid sensor was working fine.
i’ve put macbook in shelf and order new screen so i can fully repair it.
Now i got the screen and macbook stays at 5v 0a.
i’ve tried if it’s not in DFU with another macbook but it’s not detected at all.
i don’t have schematics so i don’t know where to start can someone help me?... -
Sorry,I'm using my phone right now and couldn't find any search bar to search on the topic of macbooks.
Few weeks back(mid may),I had bought a MacBook pro m1 A2338. It belonged to my friend's younger brother who was a graphic designer,he gave me this MacBook without any icloud account linked to it and I had so much work during that times that I only used it for storage while traveling for shoots (I'm a photographer). So long story short,his brother got involved in a bad accident and was in coma and then fairly recently they pulled out his life support. I mistakenly did an erase Mac and...06-20-2025, 09:43 AM -
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...
Comment