Announcement

Collapse
No announcement yet.

MacBook Pro Retina Late 2013 shows light, fan spin but no chime

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    #81
    Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

    L7095, pin # 2.

    If that is indeed 3v42, then suggest to check the voltage on each coil on the logic board. Report any low / 0 volt readings.

    Comment


      #82
      Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

      PP3V42_G3H_REG tested on L7095 pin 2: 3.42V

      Comment


        #83
        Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

        Hi mon2,

        Can you help me make these readings?

        Many thanks.

        Comment


          #84
          Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

          Attach a usb mouse. Allow the board to power up and wait a minute or so. Does the usb mouse light up?

          Comment


            #85
            Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

            I do not have any wired USB mouse

            I plug in keyboard with USB receiver.

            I can see that keyboard is connecting to USB receiver as connecting light goes out.

            Comment


              #86
              Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

              Measure the voltage of PM_BATLOW_L .

              Check it @ Q3000 - pin # 3.
              Attached Files

              Comment


                #87
                Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                00.8 on 200m mode.

                Comment


                  #88
                  Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                  Sorry is bad reading, I measured at R2140 pin 1 and showing 3.3V

                  Comment


                    #89
                    Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                    I measured at R2140 pin 1 and showing 3.3V
                    Correction: R1240 - good voltage.

                    Confirm the voltage again of PM_SLP_S4_L

                    Comment


                      #90
                      Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                      3.3v.

                      Comment


                        #91
                        Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                        Good.

                        See attached. Check each of the signals from this chart to confirm which one is still at '0' logic level.

                        When each is '1' -> the board should boot = S0 power state.
                        Attached Files

                        Comment


                          #92
                          Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                          Hi mon2,

                          Please can you help me understand this chart and what I am testing, please for your help.

                          Comment


                            #93
                            Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                            Search for each of the signal (net) names in the attached chart.

                            Measure their values and post them here. If the voltage is ~3v = '1'; then this is a good reading.

                            If the voltage is low = '0' -> stopping your board from booting up.

                            For the S0 power state, each of the highlighted signals need to be '1'.
                            Attached Files

                            Comment


                              #94
                              Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                              Isolate_cpu mem_l: 3.3v
                              plt reset_l: 3.33v
                              pm_slp_s3_l: 0.00v
                              pm_slp_s4_l: 3.33v
                              cpu_mem_reset_l: 1.35v
                              mem_reset_l: 1.35v
                              memvtt_en: 0.01v
                              cpuvddq_en: 0.00v

                              Comment


                                #95
                                Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                                I am not sure what happened but I re-tested all above again and now:

                                Isolate_cpu mem_l: 0.00V
                                plt reset_l: 0.00V
                                pm_slp_s3_l: 0.00V
                                pm_slp_s4_l: 0.00V
                                cpu_mem_reset_l: 0.00V
                                mem_reset_l: 0.00V
                                memvtt_en: 0.00V
                                cpuvddq_en: 0.00V

                                Comment


                                  #96
                                  Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                                  Will have to start from the beginning.

                                  Check PPBUS_G3H.

                                  Comment


                                    #97
                                    Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                                    Originally posted by mon2 View Post
                                    will have to start from the beginning.

                                    Check ppbus_g3h.
                                    12.59v

                                    Comment


                                      #98
                                      Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                                      Hi mon2,

                                      ALL_SYS_PWRGD is measuring as 3.19V, how can system not boot?

                                      Comment


                                        #99
                                        Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                                        Now fan started spinning again!

                                        It's spinning like jet engine when power connected but still no boot

                                        Comment


                                          Re: MacBook Pro Retina Late 2013 shows light, fan spin but no chime

                                          Okay with fan spinning ALL_SYS_PWRGD 3.19V.

                                          But it's intermittent, now fan stopped spinning and ALL_SYS_PWRGD 0.00V!

                                          So it looks like some fault on the board? But even when ALL_SYS_PWRGD is good, still no boot. Seems like stuck in SMC_BYPASS with full fan spin like jet engine?

                                          Comment

                                          Working...
                                          X