820-01041 Wont Turn On

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • MobileXT
    Senior Member
    • Oct 2012
    • 196
    • USA
    #1

    820-01041 Wont Turn On

    I have a a Macbook Pro 15" Touch 2018 that was liquid spill at Q7065. Prior to clean the area the computer was turn on but won't charge the battery. After reflowing the area ultrasonic the logic board and dry out after dry out computer won't turn on anymore. I have 19v on the charger with 975mAh. I have to test all the power rail and found out that PP3V_S5 power rail and PP1V8_S5 are missing, these power rail coming from U1200. Any suggestions or input I would really appreciate. Question! What powering up the U1200 chip?

    PPBUS_G3H is 12.56v
    Last edited by MobileXT; 08-12-2020, 10:31 PM.
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: 820-01041 Wont Turn On

      20V 0.9A but missing PP3V3_S5/PP1V8_S5? There's a probably a short to ground somewhere.
      These power rails don't come from the PCH U1200, they come from the PMIC U7800 and power the PCH.
      Power architecture of this board (like all T2 boards) is very complex and obscure, so one way to approach the problem would be to go through the list of power rails and measure voltage and exact resistance to ground on all of them.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • MobileXT
          Senior Member
          • Oct 2012
          • 196
          • USA
          #3
          Re: 820-01041 Wont Turn On

          Theres is no short to ground on these two power rail PP1V8_S5 and PP3V3_S5.

            Comment

            • MobileXT
              Senior Member
              • Oct 2012
              • 196
              • USA
              #4
              Re: 820-01041 Wont Turn On

              Problem Solve:

              I replaced ISL9240 and the battery and everything working fine now. Thanks!

                Comment

                • mon2
                  Badcaps Legend
                  • Dec 2019
                  • 14011
                  • Canada
                  #5
                  Re: 820-01041 Wont Turn On

                  @MobileXT, have to ask, from where did you source the ISL9240? A donor board or you have available new devices? Did you reball the component if used? Thanks.

                    Comment

                    • MobileXT
                      Senior Member
                      • Oct 2012
                      • 196
                      • USA
                      #6
                      Re: 820-01041 Wont Turn On

                      Originally posted by mon2
                      @MobileXT, have to ask, from where did you source the ISL9240? A donor board or you have available new devices? Did you reball the component if used? Thanks.
                      It's a Refurbish ISL9240 from Ebay.

                        Comment

                        • lightfinger
                          Member
                          • Jun 2020
                          • 12
                          • United Kingdom
                          #7
                          Re: 820-01041 Wont Turn On

                          I got the same problem but a short to ground on PP3V3_S5. Tried all the caps in the circuit no shorts. But there is short to ground. Can't find the IC responsible. Any ideas?

                            Comment

                            • mon2
                              Badcaps Legend
                              • Dec 2019
                              • 14011
                              • Canada
                              #8
                              Re: 820-01041 Wont Turn On

                              @lightfinger - what is the resistance to ground on the PP3V3_S5 rail ?

                                Comment

                                • MobileXT
                                  Senior Member
                                  • Oct 2012
                                  • 196
                                  • USA
                                  #9
                                  Re: 820-01041 Wont Turn On

                                  Originally posted by lightfinger
                                  I got the same problem but a short to ground on PP3V3_S5. Tried all the caps in the circuit no shorts. But there is short to ground. Can't find the IC responsible. Any ideas?
                                  Did you try inject voltage on PP3V3_S5?

                                    Comment

                                    • lightfinger
                                      Member
                                      • Jun 2020
                                      • 12
                                      • United Kingdom
                                      #10
                                      Re: 820-01041 Wont Turn On

                                      Thanks for your reply.
                                      Found the culprit its the U9850 and the PP3V3_S5 is short to ground there. waiting for the replacement. Will report back once I get to know where I'm.

                                        Comment

                                        • lightfinger
                                          Member
                                          • Jun 2020
                                          • 12
                                          • United Kingdom
                                          #11
                                          Re: 820-01041 Wont Turn On

                                          Originally posted by MobileXT
                                          Did you try inject voltage on PP3V3_S5?
                                          yes that's what I did and the found the culprit.

                                            Comment

                                            Previous template Next

                                            Related Topics

                                            Collapse
                                            • Nagy Daniel
                                              Lowest possible resistance on laptop motherboard rail - Guide Table request
                                              by Nagy Daniel
                                              Hi, I'm Daniel, and I'm new to the world of repairing motherboards.

                                              I would like to create a table, or more likely a guideline about the voltage rails and their possible resistance rail.

                                              I know that the motherboard design has a very big depend on the rail's resistance, but I would like to know what is the smallest value for a rail that can be acceptable. For example, I heard that some new gaming motherboards can have 0,5 Ohm resistance on the GPU rail, but on an older type, it could be a sign of a shorted GPU rail.

                                              So, I generated a table with AI so I can...
                                              03-04-2025, 08:24 AM
                                            • pajdek
                                              Lenovo Y700-17ISK turn on and off
                                              by pajdek
                                              Hello, i have some issues with my laptop Lenovo Y700-17ISK (motherboard BY511 NM-A541), it started when i turn on the laptop, but the lcd wont turn on, i then connected it via hdmi to tv and screen was ok. So i thought maybe lcd stripe is faulty, i removed the bottom cover, disconnected main battery, reset the cmos by disconnecting battery for 1 min, then slighty move the lcd stripe. Conncted power supply and tuned on my laptop, the lcd turn on, it started to load os, then it turn off, after a second it turn on, then after like 3 seconds turn off again, and so on. Removed power supply, waited...
                                              09-20-2023, 02:49 AM
                                            • Victor Moreira Silva
                                              Acer Nitro 5 LA-L181p power LED turns on by 5 secs (Short on PCH rail?)
                                              by Victor Moreira Silva
                                              Hello everyone,

                                              I'm trying to repair my old Acer Nitro 5 (AN517-54-55T5). I've already bought a new laptop, so this is more of a learning project. For the experience, with no high expectations of success.

                                              Well, my decice specs are the following:

                                              Model: Acer Nitro 5 AN517-54-55T5
                                              CPU: Intel Core i5-11400H
                                              GPU: NVIDIA GeForce GTX 1650
                                              Motherboard: GH51G LA-L181P Rev:1c

                                              The symptom:
                                              When pressing the power button, the power LED lights up for about 5 seconds and then turns off. Initially, the issue was intermittent: sometimes...
                                              05-26-2025, 10:49 AM
                                            • RdeveLabs
                                              MSI GF63 THIN 11UCX (MS-16R6) LAPTOP WON'T TURN ON AFTER RESTARTING
                                              by RdeveLabs
                                              To all the members here...

                                              Let me tell you a little bit about what happened to my laptop (MSI GF63 THIN 11UCX model: MS-16R6) that “maybe” you know how to solve this problem.

                                              So before this problem happened, my laptop was running smoothly. When I wanted to restart my laptop, it looked fine at first. But after I waited for this restart process to take a long time, until finally I panicked (because the restart process did not finish plus the laptop screen only showed a black screen), I immediately pressed and held the power button to force the laptop to turn off. But...
                                              05-05-2025, 04:59 AM
                                            • robante15
                                              Acer Aspire 4520 won't turn on after reboot
                                              by robante15
                                              Hello, I have an Acer Aspire 4520 from a couple of decades ago and I want to repair it solely for nostalgia.

                                              It happens that when I turn it on after having been disconnected for a long time, it turns on without problems, it tells me that the BIOS has been reset and that it will load the factory settings, if I tell it to continue, the computer turns on and everything works fine.

                                              The moment I turn it off and want to turn it back on a second time, or restart it and try to start it again, it no longer gives an image, and it no longer responds.

                                              If I remove the...
                                              04-06-2024, 06:50 PM
                                            • Loading...
                                            • No more items.
                                            Working...