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  1. 2informaticos

    A1989 (820-00850) RAMCFG

    Yes, test it at least. The strange thing is that original configuration (8GB) you've found on the MLB, corresponds to Micron 16GB 2133MHz Die Rev A.
  2. 2informaticos

    A1989 (820-00850) RAMCFG

    RAMCFG0-2 look good (in theory). RAMCFG3/4 should meet your chips specifications. "MLB_RAMCFG2 = High (Pull-up / No resistor to ground)" This looks strange, for original 8GB. So we can never trust Apple...
  3. 2informaticos

    MacBook Air M2 (820-02536) – Power Cycling Issue

    You can test that, just in case. However replacing NANDs will give more information.
  4. 2informaticos

    MacBook Pro A2779 820-02841 gets stuck on a black screen after a few seconds of the Apple logo

    Using a pendrive. You can first try a Live distribution, which usually comes with lot of system tools; including storage tests.
  5. 2informaticos

    MacBook Air M2 (820-02536) – Power Cycling Issue

    NAND internal failure is known for sudden death symptom. However we can't rule out all power rails. Not exact documentation available about how to follow power on sequence. All related data comes from 3rd part tehnicians; based on their repair experience.
  6. 2informaticos

    MacBook Pro A2779 820-02841 gets stuck on a black screen after a few seconds of the Apple logo

    If external monitor also gets black, there should be a problem with graphics part of CPU. You only get image until dedicated graphics driver is loaded. As you don't have data to save, check what happens with Linux, or Windows.
  7. 2informaticos

    A2251 820-01949-A 5.1V 0.24A on USB-C port after liquid damage

    R8018 is marked as "NOSTUFF" in schematic, so not even mounted. Did you test with good battery, holding some charge?
  8. 2informaticos

    MacBook Pro A2779 820-02841 gets stuck on a black screen after a few seconds of the Apple logo

    "When connected to an external monitor, it displays a secondary screen image" Main screen should appear when you close the lid.
  9. 2informaticos

    MacBook Pro A2779 820-02841 gets stuck on a black screen after a few seconds of the Apple logo

    What about external video? You may force it disconnecting internal LCD. If there is no data to save, you can try DFU restore.
  10. 2informaticos

    A2338 820-02020 no loudspeakers

    The audio jack has some contacts which decide to switch between speakers and headphones. Your problem may there.
  11. 2informaticos

    A2338 820-02020 no loudspeakers

    Any history available? Did you try known good audio board?
  12. 2informaticos

    MacBook Air M2 (820-02536) – Power Cycling Issue

    May have problems with the NANDs. You can try to reball/replace.
  13. 2informaticos

    A1990 820-0928 no display

    That is A1707 model. When board really boots, CPU core should drop to 0.65V aprox. Is in your case stuck at 1V even 10s later?
  14. 2informaticos

    A2779 820-02841-A black screen but not in recovery

    First of all, welcome to the forum! Please open new thread with your problem. Not always same symptom has the same solution. Don't forget to mention fault history also.
  15. 2informaticos

    Macbook M2 (A2338) Disk share problem

    Try booting USB preinstalled macOS, or Live Linux/Windows.
  16. 2informaticos

    Macbook M2 (A2338) Disk share problem

    What data to extract later, if is already deleted?
  17. 2informaticos

    MacBook Air M2 (820-02536) – Power Cycling Issue

    Not too low probably, but compare with good board. I got weird issues for 0.100-0.160 readings.
  18. 2informaticos

    MacBook Air M2 (820-02536) – Power Cycling Issue

    Diode mode to ground on 3V8_AON power rail?
  19. 2informaticos

    Macbook M2 (A2338) Disk share problem

    If you still can access into macOS (A2338), save data and do DFU restore.
  20. 2informaticos

    MacBook Air M2 (820-02536) – Power Cycling Issue

    Corresponding boosters of M/SPMU don't start for some reason. Not sure if these chips expect some commands from CPU, or should start by default.
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