MBP wont turn on Only green light on charger

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • vdrokko99
    Member
    • Apr 2022
    • 16
    • Hungary
    #1

    MBP wont turn on Only green light on charger

    I have a similar problem... I got an old MBP for free, but wont turn on... Only green light on charger. I measured these voltages. If i try to do an smc reset using keyboard, nothings happen, wont go out the green led. I dont know how to continue, please help me.

    SMBUS_SMC_BSA_SCL 3.5V
    SMBUS_SMC_BSA_SDA 3.5V    ​
    Click image for larger version Name: image.png Views: 0 Size: 3.4 KB ID: 3519208
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14070
      • Canada
      #2
      Voltage of PPBUS_G3H to ground?

        Comment

        • vdrokko99
          Member
          • Apr 2022
          • 16
          • Hungary
          #3
          PPBUS_G3H​ to ground is 12.56V

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14070
              • Canada
              #4
              PPBUS_G3H is good. SMC has booted. Assuming this voltage is stable and not power cycling (on/off/repeat)?

              Do you have PP5v_SUS?

              Remove all power. Meter in resistance mode. Check the resistance to ground of:

              PP5V_S3 ; if this is a low resistance, this is of concern

              Then, meter in voltage mode, check the voltage to ground of:

              P5VS3_EN ; the enable for the above rail

              reference:

              https://www.youtube.com/watch?v=B-ra8veh4HE

                Comment

                • vdrokko99
                  Member
                  • Apr 2022
                  • 16
                  • Hungary
                  #5
                  pp5v_sus 5v
                  pp5v_s3 resistance to gnd is 40 kohm

                  but i dont find p5vs3_en in boardview. In schematic i found p5vs3_en on EN1 pin of U7201. in boardview name is pm_slp_s4_l.

                  pm_slp_s4_l 0V

                    Comment

                    • vdrokko99
                      Member
                      • Apr 2022
                      • 16
                      • Hungary
                      #6
                      Sorry, my bad. PP5v_SUS is 0v. I measured on wrong pad

                      also PM_SLP_SUS_L is 3.3V,
                      SMC_BATLOW_L is 0v

                        Comment

                        • mon2
                          Badcaps Legend
                          • Dec 2019
                          • 14070
                          • Canada
                          #7
                          SMC_BATLOW_L is 0v
                          Means your power adapter is underrated.

                          You may have a fake charger. This is a show stopper due to this logic level. Source / borrow the original Apple charger for testing.

                          See the flow chart here:

                          https://logi.wiki/index.php/G3_to_S3..._and_Broadwell

                          https://logi.wiki/index.php/PM_SLP_S...roubleshooting

                            Comment

                            • vdrokko99
                              Member
                              • Apr 2022
                              • 16
                              • Hungary
                              #8
                              Thank you for your help, ASAP i will buy an other charger, and i wil try with.

                                Comment

                                • vdrokko99
                                  Member
                                  • Apr 2022
                                  • 16
                                  • Hungary
                                  #9
                                  Originally posted by mon2

                                  Means your power adapter is underrated.

                                  You may have a fake charger. This is a show stopper due to this logic level. Source / borrow the original Apple charger for testing.

                                  Yes... I bought a faulty MBP 15 2010 with the original 85 watt charger. Aaaand. Using the original original charger, the board turned on

                                  But.. Of corse, AMD GPU is faulty, so now i ask for a permanent soulition.

                                  Thank You for help.

                                    Comment

                                    • mon2
                                      Badcaps Legend
                                      • Dec 2019
                                      • 14070
                                      • Canada
                                      #10
                                      https://forums.macrumors.com/threads...ypass.2134019/

                                        Comment

                                        Previous template Next

                                        Related Topics

                                        Collapse
                                        • ahoonid
                                          820-00165 Random green light on charger
                                          by ahoonid
                                          Hey everyone,

                                          I have a MacBook Air 2017 with a weird problem. The MacBook was totally dead at first and the culprit was the C7430 capacitor which was obvious upon initial inspection as it had a fracture on its surface.

                                          The F7140 fuse was also blown so I changed them both. L7130 due to corrosion was also replaced. Now everything works again. Laptops turns on and everything seems reliable at this point.

                                          The only issue that I'm afraid might bite me in the ass later is the magsafe light as it randomly changes light from orange to green while charging. Other times...
                                          04-10-2024, 04:06 PM
                                        • MOSSEP
                                          Monitor Audio RSW12 - Green light, but no sound
                                          by MOSSEP
                                          Hi

                                          Im hoping someone might be able to give me some idea of what may be wrong with my Monitor Audio RSW12 Sub.

                                          Ive owned it since new in around 2002, so would really like to keep it running if I can, it was the first ‘decent' bit of audio equipment I ever purchased and is a little sentimental.

                                          The issue I had was that it would power up with the red light, but sometimes the green light would not come on and I would get no bass from it. If the green light did come on though, I would get sound out of it.

                                          I have already tried replacing all of the...
                                          01-26-2025, 08:33 AM
                                        • MOSSEP
                                          Monitor Audio RSW12 - Green light but no audio
                                          by MOSSEP
                                          Hi

                                          Im hoping someone might be able to give me some idea of what may be wrong with my Monitor Audio RSW12 Sub.

                                          Ive owned it since new in around 2002, so would really like to keep it running if I can, it was the first ‘decent' bit of audio equipment I ever purchased and is a little sentimental.

                                          The issue I had was that it would power up with the red light, but sometimes the green light would not come on and I would get no bass from it. If the green light did come on though, I would get sound out of it.

                                          I have already tried replacing all of the...
                                          01-26-2025, 08:18 AM
                                        • lcdcaps1
                                          820-2610-A Sys onewire help, no green light. Please help from the gurus
                                          by lcdcaps1
                                          Hi

                                          I have an 820-2610-A motherboard that has no green light.
                                          I have noticed is when I do a SMC reset the light on the Magsafe blinks.
                                          From My understanding, the sys onewire circuit is responsible for the green light on the magsafe
                                          The sys onewire circuit on this model and others is more involved
                                          I was hoping if anyone knows about this and how it works, can reply and let me know
                                          I know this is an old model but I am sure there are people who still works on these or knows about them

                                          I get 1.1v on the C7771 capacitor and will replace...
                                          11-06-2023, 01:28 PM
                                        • mcnamj70
                                          820-00165 no green light on the charger and no fan spin
                                          by mcnamj70
                                          I am troubleshooting a Macbook Air and the SMC posts a voltage of 8.2V at PPBUS_G3H.

                                          Should I replace the SMC?

                                          Macbook appears dead with no green light on the charger and no fan spin.
                                          03-20-2023, 03:57 PM
                                        • Loading...
                                        • No more items.
                                        Working...