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  1. HeyWatchOutDude

    820-02098 (A2442) - Power Cycling & DFU Restore Error 4041

    After replacing all four NANDs with known good ones, I was able to successfully restore the device via DFU (using Finder, not Apple Configurator 2). Note: The logic board was installed in the housing. A power cable (external charger, not a USB port from another MacBook) was connected. NAND...
  2. HeyWatchOutDude

    820-02098 (A2442) - Power Cycling & DFU Restore Error 4041

    Maybe Firmware related? SPI_NOR? Edit: I have removed UN100 and UN300, power cycling stopped - so maybe bad soldering job (blame on me) or one of the NANDs is faulty as well ….
  3. HeyWatchOutDude

    820-02098 (A2442) - Power Cycling & DFU Restore Error 4041

    I have checked those pages and compared them to the donor board (from which I pulled the NANDs). Both boards now look identical, except for the missing NANDs on the donor board. What am I missing? What else should I check? What about the power cycle topic? It's still occurring. Furthermore I...
  4. HeyWatchOutDude

    820-02098 (A2442) - Power Cycling & DFU Restore Error 4041

    Page 98 and 99 are for the BT/WIFI module. What exactly?
  5. HeyWatchOutDude

    820-02098 (A2442) - Power Cycling & DFU Restore Error 4041

    The NAND pages show some configuration resistors at the bottom. Where do you see them? Are you referring to the ‘Board Rev’ table? (Page 152) Furthermore, I have checked page 108—RP003, RP004, RP005, RP010, RP011, RP012, and RP013 are also present on the donor board, even though they are only...
  6. HeyWatchOutDude

    820-02098 (A2442) - Power Cycling & DFU Restore Error 4041

    It seems like the board was ultrasonically cleaned due to water damage. Yes, the battery is good, and I have also tested it without the battery. I noticed that this MacBook had five NAND chips (UN000, UN100, UN200, UN300, and UN500), which seems unusual for a 512GB model, doesn’t it? (Edit: In...
  7. HeyWatchOutDude

    820-02098 (A2442) - Power Cycling & DFU Restore Error 4041

    Hi, I have an A2442 (820-02098 / MacBook Pro 14 M1 Pro) that is power cycling every 3 seconds. The USB-C meter shows the following sequence: • 5V (PPBUS_AON = 12.26V) • 19V (PPBUS_AON = 11.96V) • Power cycling occurs (PPBUS_AON = 6V), and the cycle restarts. I have noticed that...
  8. HeyWatchOutDude

    820-02016 : Draining battery while in sleep mode

    Seems like something in WIFI chip area is draining the battery, see here: (Thermal picture was taken while MacBook was in sleep mode)
  9. HeyWatchOutDude

    820-02016 : Draining battery while in sleep mode

    Hi, I have an A2337 (820-02016) which is draining the battery while it is sleep mode. (Like 20-30% during the night) Note: - Battery has 100% health, so basically new.
  10. HeyWatchOutDude

    820-02020 - PPBUS_AON low

    Im getting the Apple logo (without progress bar) after while it disappears and I just see a black screen (backlight is on)
  11. HeyWatchOutDude

    820-02020 - PPBUS_AON low

    I have compared the AC2 restore logs with a working one …. Working one: [19:22:57.1704] Finished Recovery Restore Phase: Successful [19:22:58.7522] Recovery mode device disconnected [19:22:58.7522] Device removed when in state Restoring, moving device to transition state [19:22:58.7522]...
  12. HeyWatchOutDude

    820-02016 - No Trackpad / Keyboard

    Replacing the trackpad fixed the MacBook - was able to complete the AC2 restore. (Found out that the trackpad was shorted)
  13. HeyWatchOutDude

    820-02020 - PPBUS_AON low

    How to identify a secondary power rail? I have checked the logi wiki, couldnt find an answer: https://logi.wiki/index.php/M1_MacBooks
  14. HeyWatchOutDude

    820-02020 - PPBUS_AON low

    Battery is nearly fully charged. (PPBUS_AON = 13V - with battery) still unable to restore. Do you mean the S1 rails?
  15. HeyWatchOutDude

    820-02016 - No Trackpad / Keyboard

    macOS finder restore logs: BEGIN: RESTORED:[0x0647] cleanup_check_result [21:16:52.2653] restore-step-ids = {0x1103067B:61;0x11030635:67;0x1103130C:72;0x11030647:75} [21:16:52.2653] restore-step-names =...
  16. HeyWatchOutDude

    820-02020 - PPBUS_AON low

    I’m able to see the “restore screen” on the Mac but it’s not possible to restore it via AC2 (DFU) - ends always with error message 4014. Battery is charging, so I think the CDs are fine. Yeah I have checked it on F5200. I have also the restore logs from finder (macOS Sonoma). [19:53:17.6214]...
  17. HeyWatchOutDude

    820-02020 - PPBUS_AON low

    Yeah changed only CD3217 chips. (Also put back the original chips) Is 11.98V normal on PPBUS_AON (without battery?)
  18. HeyWatchOutDude

    820-02020 - PPBUS_AON low

    Yes, without battery connected. I have checked them, both were good.
  19. HeyWatchOutDude

    820-02020 - PPBUS_AON low

    I have replaced both CDs. (Took them from an A2337 donor board with correct order) Any idea what else can cause the low PPBUS_AON? Are the CDs paired to the logic board? No, which lines should I check? (Hint needed)
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