MacBook Pro 2019 (A1990)

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • alfredodinolfo
    Senior Member
    • Jan 2013
    • 128
    • N/A
    #1

    MacBook Pro 2019 (A1990)

    mb code:820-01827-A;
    sn:C02Z349ALVDR;
    i9 32GB Ram 1TB

    Hi, I found short on one of 6 black nand (total 1TB).
    i removed all 6 nand ( voltages all ok) and now i want to program with JC P15 but for A1990 2019 there is only 512GB configuration.
    I try A2141 1TB configurazion with TSB4228 but the position on pcb is different ( U9300 and U9400 is no stuff on A1990 but present on A2141 and U8800 and U8900 is no stuff on A2141 but present on A1990 )
    macbook with A2141 configuration run on recovery but don't complete it.​
    anyone can help me?
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • tech_guru
      Macbook Pro 2019 A2141 NAND Shorted
      by tech_guru
      Hello. If you could please help me understand what I am doing wrong...

      This model, Macbook Pro 2019 16" A2141, 512GB, EMC 3347, with T2 Security Chip, had 4 NAND Chips shorted in 1 wing (U9100, U9200, U9300, U9400) and it has 1 more in the 2nd wing (U8600) BUT NOT shorted. All chips are TSB4227 TOSHIBA-KIOXIA SN4192TWNA12014 BGA110 128GB. I got 4 new nand chips for 1 wing and programmed them by specific position of course with JCID P13 programmer.

      I also replaced the tps power ic for the ssd.
      Now all rails come up, including the ssd rails 0.9v, 1.8v, 2.5v....
      08-28-2025, 08:04 AM
    • cheebster
      MacBook Pro 2019 A2141 820-01700 NAND Issue Stuck in DFU
      by cheebster
      MacBook Pro 2019 A2141 820-01700 NAND Issue Stuck in DFU

      Ok, here's an issue ive got on a A2141 820-01700 MBP 16' 2019. No signs of life, 5.06v 0.0a on usb-c meter, on each 4 usb-c ports.

      Nand voltages are missing.

      I've found no shorts at all so far, no signs of heat via thermal camera either.

      PPBUS_G3H 12.31
      PP3V3_G3H_RTC 3.387v
      PP3V3_G3H 12.31v
      PP2v5_NAND_SSD0 0v 58 ohms
      PP2v5_NAND_SSD1 0v 57.8 ohms
      PP1v8_SLPS2R 1.8v
      PP1v1_SLPS2R 1.1v
      P3V3_G3H_SOCPMU 3.37v
      PP0V9_SLPDDR 0.9v...
      10-11-2023, 11:31 AM
    • Karmet
      MacBook Pro 16" 2019 NAND Swap
      by Karmet
      I couldn't find a post related to this, so if it exists please point me in that direction.

      I have a 2019 MacBook Pro 16" 1TB with a dead embedded NAND. I've seen some information about how it is possible to swap NANDS from certain boards, but it has to be a matching set.

      I have a MacBook Pro 2017 logic board 820-00923-A 1TB on hand that is new in the box. It should be possible to match up the NAND 0, 1, 2, 3 chips and transplant them onto this 2019 board... in theory. Has anyone approached this, or has success in doing this?
      ...
      07-24-2023, 10:48 AM
    • tomtom67
      MacBook Pro 16" (2019) A2141: power consumption? Dead GPU? MacOS not installing
      by tomtom67
      A friend brought his fresh-from-ebay macbook pro A2141 after he failed replacement keyboard plugging.
      I fixed all the little problems he introduced.

      I am unable to install macOS to this device. Both Sequoia and Catalina (from Internet Recovery) start to install, but after ~2-5 minutes into the installation the macbook does a hard restart (max fan spin for a split second, then reboot without chime).

      I noticed what I think is a very high power consumption, like 20V/1.7A when activating WiFi for internet recovery, and more like 20V/3.7-4.1A while downloading the recovery...
      10-08-2024, 08:59 AM
    • martyjelen
      Apple MacBook Pro 16-Inch 2019 - A2141 - stuck at 5V
      by martyjelen
      Hello, I have this Macbook A2141. It stuck at 5V / 0,075A. I measured all 4 ports, all the same. PPBUS_G3H is present but only 12,3V. Should be 12,6V ? according to this article : https://repair.wiki/w/MacBook_Pro_A2...w_at_5V_repair

      PP3v3_G3H_RTC_X is present - 3,3V

      PP3v3_G3H_SOCPMU is present - 3,3V

      ​What else should I check?

      Thank you for your help.
      05-05-2025, 01:34 AM
    • Loading...
    • No more items.
    Working...