MACBOOK PRO 820-02020 STUCK AT 5V

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • phantomEVO
    Badcaps Veteran
    • Mar 2013
    • 487
    • USA
    #1

    MACBOOK PRO 820-02020 STUCK AT 5V

    hi to all, please help.

    motherboard is perfect, no signs of corrosion or anything else.

    both usb ports stays at 5v@0,04/0,05amps


    PP3V3_UPC0/1_LDO & PP1V5_UPC0/1_LDO presents
    PPBUS_AON 12.28v
    PP3v8_AON 3.8v
    PP3v3_S2 "bootloop" 2,8/3,0/3,1
    PP1V8_S2 0V
    PP5v_S2 0v
    PP1v25_S2 0V



    any hints? thanks​
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 13834
      • Canada
      #2
      Check the voltage to ground of each ldo rail on each cd321x ace controller.

      remove all power and measure the resistance to ground of:

      PP3v3_S2 "bootloop" 2,8/3,0/3,1

        Comment

        • phantomEVO
          Badcaps Veteran
          • Mar 2013
          • 487
          • USA
          #3
          In diode mode, i have 0,400 on PP3V3_UPC0/1_LDO & PP1V5_UPC0/1_LDO

          no problem on PP3V3_UPC0/1_LDO and USBC0/1_3V3LDO_EN
          ​


          PP3v3_S2 is 3,2kohm 0,300mv
          Last edited by phantomEVO; 01-30-2024, 04:21 AM.

            Comment

            • phantomEVO
              Badcaps Veteran
              • Mar 2013
              • 487
              • USA
              #4
              i0ve check some voltage arounf u8100 PP3V8_AON_MPMU_ISNS_VIN 3,8v
              PP1V2_S2 0v
              PP3V3_S2_UPC floating 3v/2,5/1,6/0
              PP1V8_AON_MPMU 1,7
              PP1V5_VLDOINT_MPMU 1,5​

                Comment

                • mon2
                  Badcaps Legend
                  • Dec 2019
                  • 13834
                  • Canada
                  #5
                  Check the resistance to ground of PP1V2_S2.

                    Comment

                    • phantomEVO
                      Badcaps Veteran
                      • Mar 2013
                      • 487
                      • USA
                      #6
                      2,9k

                        Comment

                        • phantomEVO
                          Badcaps Veteran
                          • Mar 2013
                          • 487
                          • USA
                          #7
                          i've done a mistake: 1,2 is present but floating like 3,3s2

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • Bmet
                              MacBook Pro 13 inch A2238 M2 stuck on 5V
                              by Bmet
                              Hi,

                              I have a MacBook Pro 13 inch A2238 M2 and it was stuck 5V with 0 amps. I measured some important lines and I found a short on PP3V8_AON_MPMU_ISNS_VIN, I tried injecting 1v and I saw heat coming from the mPMU so I removed the pmu thinking that was the problem. I don't know why I didn't check the other side of the border but there it was, a shorted cap. I replaced the cap and the short was gone, so I reballed the PMU and put it on again but voltage was still stuck at 5V and the current was fluctuating between 0 and 0.45 amps. I checked under the thermal camera and I saw the mPM...
                              04-02-2025, 05:02 PM
                            • Steven Pieter
                              Macbook Pro A1706 820-00923-05 Stuck At 5V 0.03A
                              by Steven Pieter
                              hello everyone, let me ask, I have a macbook which is stuck at 5v and 0.03 A when tested with a usb tester. Previously I wanted to replace the screen on the device, but by accident I forgot to unplug the battery. This caused the MacBook to get stuck at 5v, previously I had replaced the CD3215 (U3100) IC because it was warm. After I replaced it the problem was still not resolved. Please guide. Thank you
                              11-24-2024, 10:02 AM
                            • Clarify4082
                              Macbook Air 2018 A1932 Bootloop
                              by Clarify4082
                              Hi,

                              I have a A1932 Macbook Air with Bootloop.

                              I already replaced the battery with a new one and reset NVRAM and SNC.
                              When I start the Macbook the Screen is coming on (no Logo) and switches of after a few seconds. If I start without the trackpad and keyboard it stays on longer.

                              If I use diagnostic (Option+D), recovery (Option+R) I always get the Apple logo and it go into online-Recovery. Even if I boot the installer from a USB-stick it ends up in online-recovery. Sometimes it crashed short after entering the wifi password, sometimes it loads the recovery...
                              01-07-2025, 09:41 AM
                            • DATATECH85
                              Macbook Pro A1990 - 820-01041 Stuck at 5V / 0.02A
                              by DATATECH85
                              Hello,
                              I am currently working on a Macbook Pro A1990 (motherboard 820-01041) which is not charging.
                              The Macbook consumes 5V and 0.019A at USB-C. There seems to be a partial short-circuit on the PPBUS_G3H rail as I have 0V on this rail.

                              I've physically separated (by removing F7000 and F7001) PPBUS_G3H and the ISL9240 charging chip to see which side the short is coming from. Removing these fuses gives me 12.6V at the output of the ISL chip (PPVBAT_G3H_CHGR_REG).
                              However, I can't work out exactly why I don't have the PPBUS_G3H rail.

                              Here are the values...
                              07-24-2024, 06:34 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...