(347) 552-2258 [email protected]

Search results

  1. 2informaticos

    A2159 820-01598 5V

    If you replace with identical chip, then something happened in the process if fan goes high. But you can't be sure if CPU isn't affected. If it is the problem, you may waste the time searching for something else.
  2. 2informaticos

    MacBook M1 Pro 14" 2021 A2442 (820-02098) — U2020 getting hot, board not powering on

    "Injected 1.5 V / 3 A" Can you explain how did that??? You can claim for Nobel prize! 1.5V divided by 4 ohm let you with just 375mA. Read something more about Ohm law... 0.368 listed for diode mode on refference table...
  3. 2informaticos

    M1 Pro 820-02020 not charging

    The percentage must appear on the battery icon; no need to have charger connected/detected. Battery percentage should decrease in time, if battery is in use. Is the machine recognized in DFU mode?
  4. 2informaticos

    no Power 24" imac 820-02009-A

    I don't have schematic for this model...
  5. 2informaticos

    M1 Pro 820-02020 not charging

    Is the battery percentage showed correctly? Check w/ and w/o charger connected. Did you try another battery data cable?
  6. 2informaticos

    M1 Pro 820-02020 not charging

    Check resistance (ohm scale) over C5220/60.
  7. 2informaticos

    A2159 820-01598 5V

    I couldn't find the datasheet for any of them...
  8. 2informaticos

    Brand New Macbook Air 13" A3240 Keyboard not working

    Thanks for fedback.
  9. 2informaticos

    820-01700-A, 1st (top left) usb-c port is dead

    Bad diode can cause higher values. Did you check all with red probe on ground for sure? Check diode mode on LDO lines of U3100; compare with other ports.
  10. 2informaticos

    Macbook A2337 820-02899

    Try injecting voltage there; no more than 1V.
  11. 2informaticos

    A2159 820-01598 5V

    Try DFU restore, just in case.
  12. 2informaticos

    A2159 820-01598 5V

    If U7410 was burnt, CPU may be damaged now.
  13. 2informaticos

    Apple MacBook Pro / Model A2141 / 820-01700-A board / 5.17v .0a / Board Damage /

    First, check diode mode to ground at L9580/1; if bad, remove U9580 and check again. If still low, possibly damaged NANDs.
  14. 2informaticos

    820-01700-A, 1st (top left) usb-c port is dead

    First of all, welcome to the forum! Check diode mode to ground on CC1/2 lines corresponding to that port. Compare readings with any other port.
  15. 2informaticos

    A2141 - No Power and 20V + 5V

    Remove both R6934/5 and check which side the short remains.
  16. 2informaticos

    820-3115-B board only works on SMC bypass mode

    You must be sure AVREF_SMC (C4921) is steady high (3.3V).
  17. 2informaticos

    820-3115-B board only works on SMC bypass mode

    Bad solders or/and accumulated crap underneath SMC. That's the reason of low SMC_DCIN_VSENSE, preventing the board to turn on.
  18. 2informaticos

    820-3115-B board only works on SMC bypass mode

    Check again the voltages from these areas. Posted values do not comply with bottom equation. SMC_PBUS_VSENSE=PBUS_S0_VSENSExR5489/(R5489+R5488). Something similar must be accomplished for SMC_DCIN_VSENSE.
  19. 2informaticos

    820-3115-B board only works on SMC bypass mode

    "is 12.26v always the G3H voltage in SMC bypass mode?" Yes! Recheck C5489/99 voltage. If still low, remove these capacitors and test again.
  20. 2informaticos

    820-02020 MBP M1 battery not charging

    You may have bad solders under U5200...
Top