macboo pro a2251 820-01949 no power

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Arshad alam4659
    Senior Member
    • Aug 2020
    • 156
    • India
    #1

    macboo pro a2251 820-01949 no power

    i have a macboo pro a2251 no power stuck at 5v i checked no short in big coil some measure volt
    PPBUS_G3H=12v
    PP3V3_G3H=3.3v
    PP3V3_UPC_X_LDO=3.3v
    PPDCIN_G3H=5v
    PP1V8_SLPS2R=1.8v
    anyone suggest me what i check
    Attached Files
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • abajor
      A2251 820-0194 CD3217B12 (U3100_W) donors/replacements
      by abajor
      I have an A2251 820-01949 which had a failed TPS62180.
      I was fortunate enough to find the video on "Exploding USB-C" https://youtu.be/CAGnMR1aVuE?si=O1oYvAyNMeAr4dv4 what was shared here on the topic.

      I was wondering if there are any cross compatible models that have been discovered?
      We have an apple ID locked A2179 Mac AIR it's CD3217B2 has different lithography and looks slightly gray but I'm assuming it's the same chip in principal, but I am also aware that for some inexplicable reason mac flashes these chips firmware depending on their location on the board....
      06-27-2024, 01:10 AM
    • zhmih
      a2251 eDP lines dead
      by zhmih
      Hey guys,
      I have this display connector water damaged.


      PP5V_G3S_ALSCAM_was corroded, not the other side where lcd backlight is.
      nevertheless, EDP_INT_AUX_N and _P both have .0l in diode mode (not shorted to ground)

      I fixed the alscam line, restored laptop via dfu. I get chime but no image on internal and external display using type-c - hdmi cable (not the original apple).

      I tried displays from a1708 and 1706 but the result is the same(I do not have another a2251 display on hands).

      Question is should I try to find...
      11-15-2023, 05:07 AM
    • Junior††
      a2251 820-01949-a boot looping after screen replacement
      by Junior††
      not sure how it happened but after replacing the screen on a2251 macbook it:

      fans turn on for a second or 2, turn off, apple logo shows, 5-10 seconds pass and then system cuts off then cycles

      thermal camera shows these are getting quite hot although i'm not sure what do to.

      i've tried internet restore, same thing, put the old screen back on, same thing. which i'm inclined to think i f'd this up somehow or another. or the part that was given is faulty and caused something to go wrong. but I want to believe it's someone not me, but i'm prepared to think i...
      07-15-2025, 09:17 PM
    • alfredposadas09
      a2251 820-01949 usb c amp meter malfunction when battery is plugged
      by alfredposadas09
      a2251 820-01949 usb c amp meter malfunction when battery is plugged, can someone help me to troubleshoot this? no short on sda and scl lines and 3.3 voltage on both lines
      05-12-2025, 10:08 PM
    • MikoMiko
      MacBook Pro A2251 - 820-01949-A not charging
      by MikoMiko
      Hello everyone, I have a MacBook Pro 13” 2020 (Four ports) (Model A2251 with the 820-01949-A logicboard). It had some minor liquid damage but I carefully cleaned the logic board with alcohol and let it dry as needed. Now I encounter following situation: The MacBook does start but the Battery is not charging when a cable is plugged in any of the ports (I use the powerbrick and cable that came with the device). It had some charge left, so I could safe some data, but I was limited my the 13% and the speed of airdrop. The liquid-damage is almost only limited to the side of the logic board where...
      03-24-2025, 11:09 AM
    • Loading...
    • No more items.
    Working...