macboo pro a2251 820-01949 no power

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Arshad alam4659
    Senior Member
    • Aug 2020
    • 157
    • 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

    if you find these attachements useful please consider making a small donation to the site

Related Topics

Collapse

  • MICHAEL_2013
    Macbook Pro Core I7 A2251 EMC3348 Help Remove MDM
    by MICHAEL_2013
    Good afternoon. My client brought me a Mac A2251 EMC 3348 that he bought at a sale. The computer is completely iCloud-free, but it came with MDM installed. He has tried contacting the company that provides the MDM in every way possible, but they are unwilling to offer a solution. The device is:
    Model A2251 EMC 3348. Serial Number: C02G54CZML85
    Apple MacBook Pro Core i7 2.3, 13" 2020, 512 GB SSD, 16 GB RAM.
    I've tried changing the serial number of the SoC ROM MX25U3235F, but it hasn't worked:
    C02G54CZML84 only works up to Monterey.
    C02G54CZML86 doesn't work (I...
    11-20-2025, 11:18 AM
  • 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
  • manymonsteras
    Macbook Pro - A2251 - No power when battery is connected
    by manymonsteras
    I am hoping to get some advice. I have a 2020 13" Macbook Pro - A2251 that wouldn't turn on. I have done lots of electronics repair in the past but never on Macbooks. I have had this laptop sitting around and I finally decided to take a look at it and see if I could spring some life into it.

    First, it wouldn't boot up at all. I did a DFU restore and managed to get it to power on. Did a full restore but the battery was dead and wouldn't charge. I put in a new battery in it but now it won't boot up when the new battery is connected. I ordered a second new battery just in case,...
    11-20-2025, 09:42 PM
  • marshmallows
    A2251 burnt ics on logic board
    by marshmallows
    I have a A2251 2020 MBP with 4 Thunderbolt Ports. It has been working fine for some time and I woke up one morning to an unresponsive notebook

    Opened it up and it looks like there are several ICs, which I think are capacitors burnt out.

    How do I go about fixing this? I have repaired many iPhones in the past, but never a laptop motherboard. Do these capacitors just fail on a MBP? In which case, I assume I could just replace them and be good to go. Or does this indicate an upstream failure?...
    09-10-2025, 03:46 PM
  • 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
  • Loading...
  • No more items.
Working...