Macbook Pro 14" A2442 820-02098-a

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • obelix24
    Badcaps Veteran
    • Jun 2023
    • 291
    • Slovakia
    #1

    Macbook Pro 14" A2442 820-02098-a

    I have this macbook pro that is not turning on.

    taking 5V 0,05a on USB-C meter.

    PPBUS_AON - stable 12,33V
    PP3V8_AON - stable 3,8V

    Strange thing is that when battery is connected and i connect USB-C charger it shows 5V then when i disconnect and reconnect it' doesn't turn on USB-C meter at all (i have to disconnect and connect battery)

    I've checked and PPBUS_AON or PPVBAT_AON_CHRG_REG are not shorted to ground.

    any idea how to proceed ?
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14028
      • Canada
      #2
      Connect the USB-C charger (only). No battery. Measure the voltage to ground on each pin of the battery connector. Post each measurement.

        Comment

        • obelix24
          Badcaps Veteran
          • Jun 2023
          • 291
          • Slovakia
          #3
          measuring just board (nothing connected) on J5151

          SYS_DETECT_L - 0V
          SMBUS_BATT_SCL - not stable 0,3 - 0,4V
          SMBUS_BATT_SDA - not stable 0,3 - 0,4V

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14028
              • Canada
              #4
              SMBUS_BATT_SCL - not stable 0,3 - 0,4V
              SMBUS_BATT_SDA - not stable 0,3 - 0,4V
              These are not good measurements and may denote an issue. Remove all power. Meter in DIODE mode. Red meter probe to ground; yes ground.

              Black meter probe to point to test.

              Test the above 2 lines of interest using this diode mode:

              SMBUS_BATT_SCL
              SMBUS_BATT_SDA​

                Comment

                • obelix24
                  Badcaps Veteran
                  • Jun 2023
                  • 291
                  • Slovakia
                  #5
                  In diode mode both 0,542

                    Comment

                    • mon2
                      Badcaps Legend
                      • Dec 2019
                      • 14028
                      • Canada
                      #6
                      These lines are not shorted but may only be missing the pull up voltage. Hunt for the 2*pull up resistors on these lines. Then carefully confirm the voltage on the pull up resistors. Is it present? If not, remove all power. Measure the resistance to ground of the pull up voltage rail. We are checking if the pul up voltage rail is being shorted.

                        Comment

                        Previous template Next

                        Related Topics

                        Collapse
                        • rilley
                          MacBook Pro 13inch 2017mid (A1706 820-00923-A) - liquid damage - USBC and Display short circuit
                          by rilley
                          Hello everyone,
                          I am new into this, sorry to post it here. I want to make this as a pet hobby project, as this mac is not urgent.

                          I have (Macbook Pro 13inch 2017mid) A1706 820-00923-A

                          My mac had liquid damage a long time ago, the connector from J8500 is damaged on pin 46 (PP5V_S0_ALSCAM_F), I guess the LCD/display panel is in short circuit, as I saw the connector from the LCD burned as well.

                          And the resistor L4004 is literally burned.

                          From what I see from the schematics, it does not affect any other rails, only the connection to the display...
                          07-10-2024, 01:57 AM
                        • dbuergi
                          Macbook A2442 no display board 820-02098
                          by dbuergi
                          Hi all,

                          i got a Macbook A2442 which statrts normal but is not showing any picture. Using an external monitor works fine. After opening the Macbook i found a dried up line of liquid damage around CN979, RD503, and UP730. I cleaned up everything and also unsoldered the chips to clean the pads. There were no shorts before but i still don't have any picture. Sometimes you can see a glimpse of light in the middle of the display.
                          So before i change the whole display i want to make sure that it's not any issue with the logicboard. So any ideas what i can check next?...
                          05-25-2025, 10:58 AM
                        • TechSplendid
                          MacBook A2442 not powering on – suspecting CD3217, but replacement didn’t help
                          by TechSplendid
                          Hi All,

                          I'm working on a MacBook Pro A2442 (14", 2021) that's not powering on. On two out of three USB-C ports, I get 5V and the current briefly ramps up to around 0.210A before dropping to 0.036A. On the third port (JF600), I only get 0.0045A and it stays there.

                          Initially, I suspected a faulty CD3217 on that port, especially since I noticed signs of previous liquid damage near the JF600 USB connector. I replaced the CD3217 with an UF400 (from an A2442 donor board from the same location). According to the supplier, this should be a compatible version, but the behavior...
                          04-09-2025, 02:13 AM
                        • Constantinos
                          Macbook Pro A2442 820-02098 No image but has backlight
                          by Constantinos
                          Hi all
                          I have a Macbook Pro A2442 with the 820-02098 from a friend which has no picture on the display, however, the backlight works.
                          He was streaming a football match on a questionable site, then the site crashed, and the problem emerged.
                          Initially, he sent it to apple, who quoted him £1323.95 to replace the display, lid angle sensor and top case.
                          Obviously, he decided against this and gave it to me so that I could have a crack at it.
                          From initial diagnostics, I connected to an external monitor, I first tried with a HP 22W monitor, and I booted into the boot menu...
                          08-24-2024, 09:48 AM
                        • Enzo150i
                          MacBook A2442 exclamation mark after oxydation
                          by Enzo150i
                          Hi all,
                          I have a MacBook Pro A2442 with board 820-02098-A very highly oxydated (water) by an accident.
                          The customer just need to recover the data (no backups, heh), so we cleaned fully to make it power on.
                          Fortunately the Mac is still alive but it shows an exclamation mark in a circle (!) (Apple T2 fw issue?) with the text "support.apple.com/mac/restore" and doesn't go further.

                          We tried to interface with another Mac, but can't get in DFU. Very likely the keyboard is gone too because the water, so we're planning to buy a cheap compatible one just to....
                          06-29-2025, 01:26 PM
                        • Loading...
                        • No more items.
                        Working...