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Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

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    #41
    Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

    I have no power
    SSD_CLKREQ_L=0
    TBT_T_CLKREQ_L=0
    but as I understand it there should be 3.3v

    Comment

      #42
      Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

      SSD_CLKREQ_L=3.3V until you connect SSD_PCIE_CLKREQ_LB_L then the voltage drops to 0.090V. but there is no short circuit. resistance SSD_PCIE_CLKREQ_LB_L=3.75 megohm.
      Last edited by PITERPENY; 11-02-2023, 02:25 PM.

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        #43
        Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

        No. If with the _L suffix then if the signal is 0V = logic low then it is active. This is good for these 2 signals.

        Comment

          #44
          Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

          Originally posted by mon2 View Post
          No. If with the _L suffix then if the signal is 0V = logic low then it is active. This is good for these 2 signals.
          SSD_CLKREQ_L=0v but it should be 3.3v? maybe the problem is in UB000?

          Comment

            #45
            Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

            No, this signal is ok.

            Reference:

            https://boards.rossmanngroup.com/thr...ing-ssd.39782/

            Comment

              #46
              Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

              how can it be that all the readings are normal but the ssd is not working?

              Comment

                #47
                Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                Originally posted by mon2 View Post
                No, this signal is ok.

                Reference:

                https://boards.rossmanngroup.com/thr...ing-ssd.39782/
                what else to check?

                Comment

                  #48
                  Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                  PCIE_CLK100M_SSD_LB_P=0V
                  PCIE_CLK100M_SSD_LB_N=0V


                  These lines should not be 0V when the ssd is working. This clock is generated by the pch. This clock is required by all pcie devices to function. This is a 100mhz clock.

                  Comment

                    #49
                    Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                    the voltage on these lines exists and fluctuates

                    PCIE_CLK100M_SSD_LB_P=0.725V
                    PCIE_CLK100M_SSD_LB_N=0.716V

                    Comment

                      #50
                      Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                      I also noticed that when connecting an external monitor via type-C there is no image (maybe there is a connection).

                      Comment

                        #51
                        Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                        any more advice? recommendations?

                        Comment

                          #52
                          Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                          Comment

                            #53
                            Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                            Remove all power. Meter in DIODE mode.

                            Red meter lead, yes RED to ground.

                            Black meter lead to the point to test.

                            Measure each signal of the SSD interface in DIODE mode at the lifeboat jumper block area.

                            Post each measurement.

                            Comment

                              #54
                              Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                              Originally posted by mon2 View Post
                              Remove all power. Meter in DIODE mode.

                              Red meter lead, yes RED to ground.

                              Black meter lead to the point to test.

                              Measure each signal of the SSD interface in DIODE mode at the lifeboat jumper block area.

                              Post each measurement.
                              OKAY CHEF.
                              PPVIN_2V7NAND_LB=0.422

                              PP5V_S4_P2V7NAND_LB=0.396
                              SSD_BOOT_LB_L=0.394
                              SSD_PWR_EN_LB_L=0.535
                              STORAGE_LB_EN=0.515
                              SSD_RESET_LB_L=0.509
                              SSD_PCIE_CLKREQ_LB_L=0.510
                              PCIE_SSD_D2R_LB_P<0>=0.387
                              PCIE_SSD_D2R_LB_N<0>=0.387
                              PCIE_SSD_R2D_LB_C_P<0>=0.358
                              PCIE_SSD_R2D_LB_C_N<0>=0.357
                              PCIE_CLK100M_SSD_LB_P=0.337
                              PCIE_CLK100M_SSD_LB_N=0.336
                              LPSR_EN_LB_L=0.490

                              PP3V3_S5_SSD_LB=0.351

                              Comment

                                #55
                                Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                I have TBT_T_CLKREQ_L=0v. and in a working MacBook TBT_T_CLKREQ_L =3.3v.

                                Comment

                                  #56
                                  Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                  how to check if the ssd is working properly? Maybe they have a problem or in the processor?

                                  Comment

                                    #57
                                    Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                    I already mentioned that the SSD controller has a RAM layer above the processor and these are often underfilled. You didn't mention whether you had reballed that layer or not, and what the source of the replacement was.

                                    As far as the NAND's go, you can use the JC P13 programmer to test.

                                    Comment

                                      #58
                                      Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                      Originally posted by reformatt View Post
                                      I already mentioned that the SSD controller has a RAM layer above the processor and these are often underfilled. You didn't mention whether you had reballed that layer or not, and what the source of the replacement was.

                                      As far as the NAND's go, you can use the JC P13 programmer to test.
                                      Yes, both layers were soldered 2 times but the result was zero. the second donor controller was also soldered from another board, but the result was also zero. I will look for another donor fee.

                                      Comment

                                        #59
                                        Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                        Originally posted by PITERPENY View Post
                                        OKAY CHEF.
                                        PPVIN_2V7NAND_LB=0.422

                                        PP5V_S4_P2V7NAND_LB=0.396
                                        SSD_BOOT_LB_L=0.394
                                        SSD_PWR_EN_LB_L=0.535
                                        STORAGE_LB_EN=0.515
                                        SSD_RESET_LB_L=0.509
                                        SSD_PCIE_CLKREQ_LB_L=0.510
                                        PCIE_SSD_D2R_LB_P<0>=0.387
                                        PCIE_SSD_D2R_LB_N<0>=0.387
                                        PCIE_SSD_R2D_LB_C_P<0>=0.358
                                        PCIE_SSD_R2D_LB_C_N<0>=0.357
                                        PCIE_CLK100M_SSD_LB_P=0.337
                                        PCIE_CLK100M_SSD_LB_N=0.336
                                        LPSR_EN_LB_L=0.490

                                        PP3V3_S5_SSD_LB=0.351
                                        What can you say about these indicators?

                                        Comment

                                          #60
                                          Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                          Note that reprogramming the bios can also solve no SSD/hdd issue.

                                          Comment

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