got this water damage notebook with no black light issue which i sloved by sold broken connections.now notebook is ok works fine but the only issue is its very slow.i run online diagnose and it shows the following....PP001 there may be an issue with the power management system.................PFM006 there may be an issue with system management controller (SMC).regarding these two errors what could be the problem ..any suggations
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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... -
Apple MacBook Pro Retina 13' A1502 820-3536-A Schematic...10-12-2024, 11:43 AM
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Hello,
i have a Macbook A1502 with No Backlight but the image is on as confirmed by a flashlight.
the macbook was dirty so i went ahead and cleaned it. the light back on for a couple of minutes and now its again back off.
The resistance of the Pins at j8300 look okay as confirmed by tallying from a donor board.
I think its a mosfet issue with the Q7701 but never quite understood how these things work.
Can anyone guide? -
Subject: Help Needed: MacBook A1278 (3115) No PPBUS_G3H Issue
Hello everyone,
I'm working on a MacBook A1278 with the 3115 logic board and facing an issue with no PPBUS_G3H voltage. Here's what I've checked so far:- U7000 Measurements:
- Pin 3 has 0V, even though R7012 shows 16.5V from PPDCIN_S5_CHGR.
- Resistors:
- I measured R7010 and R7011 with one leg disconnected, and both tested OK.
Based on these findings, I believe U7000 needs to be replaced. However, I have a related question:- If I also decide to replace the SMC, do I need to order it pre-programmed,
- U7000 Measurements:
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Hello there
I have problem with Macbook Pro 15" 2017, model 2017, MB code 820-00928.
I bought it as broken with some artefacts on the screen, first I thought that this is problem with ribbon cable but after inspectiing ribbon cable I know it is fine. I tried to reinstall macOs and then I figured out that this must be something with GPU as installation freezes at the end (when drivers are loaded). I installed Windows and was able to install every each of drivers except GPU driver, as soon as I tried to install GPU driver - black screen and restart.
...11-21-2024, 05:25 AM