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  1. 2informaticos

    A2681 (820-02536) - Unknown Device (DFU)

    Apart of CPU problem... It should be correctly recognized at least; even with bad NANDs.
  2. 2informaticos

    A2681 - Repair Assistant / Touch ID sensor

    Check R2004/5 and their traces. Did you try another daughter board? TOUCHID_PWR_EN goes high?
  3. 2informaticos

    A2442 820-02098 not charging

    Same behavior with Magsafe 3 and USBC chargers? Force a short over R5150 pads and test again the machine.
  4. 2informaticos

    820-02536 liquid damage 5V 0A

    Put back Q5216 and check if AUX_DET maintain its level. Check resistance (ohm scale) over C5220/60. Also check the values of all adjacent components and traces continuity.
  5. 2informaticos

    820-01700 - short on U6960

    Sorry for error, CD3217 has only two LDOs. Can you test if board works with (charged) known good battery?
  6. 2informaticos

    A2442 820-02098 not charging

    Any fault history available? The battery isn't recognized at all?
  7. 2informaticos

    820-01041 wake up problem

    Change your multimeter battery and post again voltages...
  8. 2informaticos

    820-01700 - short on U6960

    All ports have now the same behavior? Do you get 1V1 LDO on all CD3217 chips? Did you replace U3200 with chip from donor board, same position?
  9. 2informaticos

    [help]imac 21,5 a1311 820-2641! is it a kind of magic?

    Why injecting voltage with CPU installed? If you have good diode mode reading without CPU, you should try another CPU. If still low reading without CPU, there is something else bad on that line.
  10. 2informaticos

    820-02536 liquid damage 5V 0A

    I think is correct for 5V input. Post actual U5200 basic voltages; with F5200 removed.
  11. 2informaticos

    Air A3114 2024 M3 (820-03286) stuck at 5V USB-C

    Try replacing the NANDs...
  12. 2informaticos

    820-02773 USB Activity but no image WiFi issue

    No reaction at all on external monitor? DFU seems to be the only way to recover the data in this case.
  13. 2informaticos

    [help]imac 21,5 a1311 820-2641! is it a kind of magic?

    Draw 0.022A in which conditions?
  14. 2informaticos

    [help]imac 21,5 a1311 820-2641! is it a kind of magic?

    "amp draw of of 0,022v" Not sure what this mean; don't mix ampers and volts!
  15. 2informaticos

    820-02536 liquid damage 5V 0A

    Then you have problems with R5215/16 divider, or U5200.
  16. 2informaticos

    [help]imac 21,5 a1311 820-2641! is it a kind of magic?

    Posibbly bad solders. Seems that board reacts under presure.
  17. 2informaticos

    [help] a1502 820-4924 extremely slow after liquid spill repair

    Tested starting in safe mode? Did all mentioned in my previous post?
  18. 2informaticos

    [help] a1502 820-4924 extremely slow after liquid spill repair

    Tried known good trackpad board also? Check all traces and solders adjacent to U5870. Be sure all Q587x transistors have good traces to U5870. R5870 is still OK?
  19. 2informaticos

    820-02536 liquid damage 5V 0A

    "AUX_DET 0.52V" Should be 1.2V aprox, for 5V input. "F5200 has been lifted" Still no voltage at C5252? Remove Q5216 and test again.
  20. 2informaticos

    A2681 (820-02536) - Unknown Device (DFU)

    I never faced with such issue. Possibly CPU problem. Just in case, erase SPI ROM (U1900) and try DFU again. Don't forget to make backup first!
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