Macbook A1502 / 820-4924-A / Not always boot

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • GfilipeZ
    Member
    • May 2021
    • 43
    • Portugal
    #1

    Macbook A1502 / 820-4924-A / Not always boot

    Hi,

    I'm working on this machine, and like the title says, it doesn't always boot.
    If I let the Logic Board for a while disconnected from the battery, most of the time it boots. But when I turn it off, and let the battery connected for 20/30*min it doesn't boot. And makes this all over again.

    When it doesn't boot, the PM_SLP_S4_L is missing.

    In the past, I had one A1466 with the same problem. And cleaning the ME Region solved the problem.

    Can anyone help me cleaning my EFI ME Region?
    Attached Files
    Tags: None
    • hoaca388
      Badcaps
      • Jan 2022
      • 11888
      • Socialist Republic of Vietnam
      #2
      Re: Macbook A1502 / 820-4924-A / Not always boot

      Originally posted by GfilipeZ
      Hi,

      I'm working on this machine, and like the title says, it doesn't always boot.
      If I let the Logic Board for a while disconnected from the battery, most of the time it boots. But when I turn it off, and let the battery connected for 20/30*min it doesn't boot. And makes this all over again.

      When it doesn't boot, the PM_SLP_S4_L is missing.

      In the past, I had one A1466 with the same problem. And cleaning the ME Region solved the problem.

      Can anyone help me cleaning my EFI ME Region?
      Here
      Attached Files
      ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Mọi khoản quyên góp cho badcaps đều được hoan nghênh, hãy nhấp vào liên kết này để quyên góp. Cảm ơn tất cả những người ủng hộ----------------------------------------------------------------------------------------------------------------------------------------------------------------

        Comment

        • GfilipeZ
          Member
          • May 2021
          • 43
          • Portugal
          #3
          Re: Macbook A1502 / 820-4924-A / Not always boot

          Many thanks hoaca388!!!

          I will give you feedback.

            Comment

            Previous template Next

            Related Topics

            Collapse
            • No Lan
              [Macbook pro A1708] [Boot loop] [Trackpad ?]
              by No Lan
              Hey everyone,

              Usually, I'm not the type to ask for help, but this time, I'm calling on your wisdom and expertise I've seen what this community can do, so I'm pretty sure you guys can help me out.

              Here's the deal: I noticed my MacBook got stuck in a boot loop. After opening it up and doing some initial troubleshooting, I found that the boot loop stops only when the trackpad is unplugged.

              Now, just so you know, the trackpad actually works — I tested it with another motherboard and it's all good. Same for the cable, no issues there. The problem is only...
              05-24-2025, 03:09 PM
            • twonk9098
              Macbook Pro mid 2015 battery required to boot?
              by twonk9098
              I have read many forums that state the Macbook Pro 2015 needs / does not need a battery to boot. I'm not convinced as yet which is correct.
              The Macbook Pro mid 2015 I have has no battery and do not really want to buy one just to test.
              This model has the newer trackpad which is not clickable when turned off.
              At the moment, without battery it does turn on with no display (with backlight), no chime and then turns off after 13 seconds. I see this from the power draw on my DTPS.
              If I hold the power button whilst connecting the magsafe 2 charger it turns on, again no image but...
              12-10-2024, 06:51 PM
            • gbuniva
              MacBook A1502 (820-3476-A) Repair case with solution
              by gbuniva
              Hi everyone, I want to share my tech experience with a MacBook Pro A1502 late 2013 that won´t turn on.
              The computer arrived dead, when connected to Magsafe no lights on the connector.
              Here some Measures at some testpoints on de LB 820-3476-A :

              PP3V42_G3H 1.7V
              PPBUS_G3H = 0V
              PPVBAT_G3H_CHGR_RE = 0V
              PP3V3_S5 = 0V
              PP5V_S4 = 0V
              P5V1_SW = 5.5V
              PP3V3_S0SW_SSD =0V
              PP3V3_S0SW_SSD_FET =0V
              PPDCIN_G3H_INRUSH = 16.10V
              PPDCIN_G3H_CHGR = 16.10V
              PP5V_S5 - 0v
              PP3V3_S5 - 0v
              PP3V3_SUS - 0V
              PM_RSMRST_L - 0v...
              04-09-2025, 07:11 PM
            • veedo
              Macbook A2442 820-02098 boot and display issue
              by veedo
              Hi All
              I have MacBook A2442 which had keyboard replaced and now it doesn't turn on correctly, it have sound chime from time to time and Apple logo shows on the display and there is no backlight on, apple logo appear and stuck on kind of boot loop. But if one of the display flexes is disconnected from the motherboard then MacBook turns of fine with the external monitor and it keeps working fine.
              Without keyboard its still have same issue, I don't have second display to replace it and compare but does display can make issues with boot?
              I found component UD290 ( SF0101-I2C) little...
              04-01-2024, 06:06 AM
            • PITERPENY
              Macbook A2251 no boot
              by PITERPENY
              The MacBook does not boot. It is restored via DFU without errors. The MacBook charges and consumes 20V/2A. There is no sound when connecting the charger. The caps lock does not light up, but the touchpad clicks. The fans do not rotate. No signs of life. Please advise.
              01-05-2025, 03:11 PM
            • Loading...
            • No more items.
            Working...