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

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  • PITERPENY
    Badcaps Veteran
    • Jul 2023
    • 455
    • Ukraine

    #21
    Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

    Can the same be done during repair work?

    Comment

    • mon2
      Badcaps Legend
      • Dec 2019
      • 13892
      • Canada

      #22
      Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

      Visually looks ok but does not hurt to perform a quick test across each pair of pads as a confirmation.

      Comment

      • PITERPENY
        Badcaps Veteran
        • Jul 2023
        • 455
        • Ukraine

        #23
        Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

        Originally posted by mon2
        Visually looks ok but does not hurt to perform a quick test across each pair of pads as a confirmation.
        I checked, everything is beeping. replaced U8600. did not help. everything remains the same

        Comment

        • PITERPENY
          Badcaps Veteran
          • Jul 2023
          • 455
          • Ukraine

          #24
          Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

          Originally posted by mon2
          Visually looks ok but does not hurt to perform a quick test across each pair of pads as a confirmation.
          Do you think it's worth resoldering the SSD chip?

          Comment

          • mon2
            Badcaps Legend
            • Dec 2019
            • 13892
            • Canada

            #25
            Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

            No. For now leave the ssd alone.

            Earlier wanted to link this video by Paul:

            https://youtu.be/WbuRSUitwCw?si=Qa3GSW2fGYU-mQfm

            Give it a review.

            Comment

            • reformatt
              Badcaps Legend
              • Feb 2020
              • 1399
              • Australia

              #26
              Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

              Could be a dead SSD controller. The whole area is underfilled and a complete PITA to rework.

              If you are going down that route, you might want to consider the iBoff SSD upgrade kits for T1 systems. I just did one on an A1707 and it works great. Only downside is you need a 2230 or 2242 sized NVMe SSD, and it must be single sided. You get the list of SSD's he has tested as working once you purchase the kit (doesn't want to make it public as the prices of those drives would naturally go up).

              Main thing this board needs are the PCIe lanes to the PCH, reset line and 3.3V.

              https://www.tindie.com/products/ibof...for-a1706-mbp/

              Comment

              • PITERPENY
                Badcaps Veteran
                • Jul 2023
                • 455
                • Ukraine

                #27
                Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                Originally posted by reformatt
                Could be a dead SSD controller. The whole area is underfilled and a complete PITA to rework.

                If you are going down that route, you might want to consider the iBoff SSD upgrade kits for T1 systems. I just did one on an A1707 and it works great. Only downside is you need a 2230 or 2242 sized NVMe SSD, and it must be single sided. You get the list of SSD's he has tested as working once you purchase the kit (doesn't want to make it public as the prices of those drives would naturally go up).

                Main thing this board needs are the PCIe lanes to the PCH, reset line and 3.3V.

                https://www.tindie.com/products/ibof...for-a1706-mbp/
                this is a good idea but I'm a newbie and it's still early)))
                ssd controller do you mean U8600? I replaced it. or did you mean something else? Around the U8600 and SSD chips, all voltages fluctuate and are normal.

                Comment

                • PITERPENY
                  Badcaps Veteran
                  • Jul 2023
                  • 455
                  • Ukraine

                  #28
                  Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                  Originally posted by mon2
                  No. For now leave the ssd alone.

                  Earlier wanted to link this video by Paul:

                  https://youtu.be/WbuRSUitwCw?si=Qa3GSW2fGYU-mQfm

                  Give it a review.
                  what Paul says in the video, I checked the first one (PICCOLO_IUVD =1.8m as expected). I have P2V7NAND=2.7v. here something else is preventing the initialization from going through.

                  Comment

                  • PITERPENY
                    Badcaps Veteran
                    • Jul 2023
                    • 455
                    • Ukraine

                    #29
                    Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                    I changed the U9300 again and the result was zero.

                    Comment

                    • reformatt
                      Badcaps Legend
                      • Feb 2020
                      • 1399
                      • Australia

                      #30
                      Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                      Originally posted by PITERPENY
                      this is a good idea but I'm a newbie and it's still early)))
                      ssd controller do you mean U8600? I replaced it. or did you mean something else? Around the U8600 and SSD chips, all voltages fluctuate and are normal.
                      Yes. On the boards I have here, these are underfilled and are double decker with RAM on top. The one I took off the A1707 was underfilled between the RAM and controller too. So depending on where you got the replacement, you may need to reball the RAM layer.

                      The one I put the kit on, I got it off eBay as MDM locked, and the seller destroys this section by using a knife on the NAND's and controller. The beauty of this kit is that you don't need to worry too much about ripping pads or sourcing new chips. The only pads you need to worry about are the PCIe lanes to the PCH and they aren't even under any of the chips.

                      Comment

                      • PITERPENY
                        Badcaps Veteran
                        • Jul 2023
                        • 455
                        • Ukraine

                        #31
                        Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                        Originally posted by reformatt
                        Could be a dead SSD controller. The whole area is underfilled and a complete PITA to rework.

                        If you are going down that route, you might want to consider the iBoff SSD upgrade kits for T1 systems. I just did one on an A1707 and it works great. Only downside is you need a 2230 or 2242 sized NVMe SSD, and it must be single sided. You get the list of SSD's he has tested as working once you purchase the kit (doesn't want to make it public as the prices of those drives would naturally go up).

                        Main thing this board needs are the PCIe lanes to the PCH, reset line and 3.3V.

                        https://www.tindie.com/products/ibof...for-a1706-mbp/
                        https://iboffrcc.com/pages/-guide-so...#1084;п:

                        By the way, there are step-by-step instructions, but I would still like not a simple solution, but to figure out why these components do not work, what is wrong and I will be grateful for ideas on troubleshooting

                        Comment

                        • PITERPENY
                          Badcaps Veteran
                          • Jul 2023
                          • 455
                          • Ukraine

                          #32
                          Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                          so let's continue the execution.
                          after the last measurements, I don’t know whether this is normal or not, but I have PP0V9_SSD_REG = 0.9V on the signal, but the resistance seems too high to me 330 ohms. 0.132V in diode mode.

                          Comment

                          • mon2
                            Badcaps Legend
                            • Dec 2019
                            • 13892
                            • Canada

                            #33
                            Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                            If PP0V9_SSD_REG @ 0v9 is stable then the resistance on this rail is fine. Keep in mind that low voltage rails are often with a low resistance so 330 ohms is ok.

                            For example, CPU & GPU power rails will often be under 100 ohms to ground for their resistance.

                            Comment

                            • PITERPENY
                              Badcaps Veteran
                              • Jul 2023
                              • 455
                              • Ukraine

                              #34
                              Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                              Originally posted by mon2
                              If PP0V9_SSD_REG @ 0v9 is stable then the resistance on this rail is fine. Keep in mind that low voltage rails are often with a low resistance so 330 ohms is ok.

                              For example, CPU & GPU power rails will often be under 100 ohms to ground for their resistance.
                              Well then I'm confused. what else could be preventing the SSD from initializing?

                              Comment

                              • mon2
                                Badcaps Legend
                                • Dec 2019
                                • 13892
                                • Canada

                                #35
                                Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                What is the voltage to ground for the following?

                                PCIE_SSD_D2R_P
                                PCIE_SSD_D2R_N


                                Remove all power. Then check the above lines in DIODE mode.

                                Red meter probe to GROUND - yes ground.

                                Black meter probe to PCIE_SSD_D2R_P. What is the voltage ?

                                Then repeat with PCIE_SSD_D2R_N.

                                Checking to see if these lines are shorted or not.

                                I am assuming that the PCIe SSD is a high speed model so it will demand that both the Pair #0 and Pair #1 lines will be active to kick up the transfer speed.

                                x1 = PCIe slowest interface
                                x2 (SSD) = faster
                                x4 = faster than above
                                x16 = faster than above

                                Comment

                                • PITERPENY
                                  Badcaps Veteran
                                  • Jul 2023
                                  • 455
                                  • Ukraine

                                  #36
                                  Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                  Originally posted by mon2
                                  What is the voltage to ground for the following?

                                  PCIE_SSD_D2R_P
                                  PCIE_SSD_D2R_N


                                  Remove all power. Then check the above lines in DIODE mode.

                                  Red meter probe to GROUND - yes ground.

                                  Black meter probe to PCIE_SSD_D2R_P. What is the voltage ?

                                  Then repeat with PCIE_SSD_D2R_N.

                                  Checking to see if these lines are shorted or not.

                                  I am assuming that the PCIe SSD is a high speed model so it will demand that both the Pair #0 and Pair #1 lines will be active to kick up the transfer speed.

                                  x1 = PCIe slowest interface
                                  x2 (SSD) = faster
                                  x4 = faster than above
                                  x16 = faster than above
                                  PCIE_SSD_D2R_P=0.388V
                                  PCIE_SSD_D2R_N=0.389V
                                  no short circuit

                                  Comment

                                  • mon2
                                    Badcaps Legend
                                    • Dec 2019
                                    • 13892
                                    • Canada

                                    #37
                                    Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                    In dc meter voltage mode, do you see a voltage to ground on these lines?

                                    Comment

                                    • PITERPENY
                                      Badcaps Veteran
                                      • Jul 2023
                                      • 455
                                      • Ukraine

                                      #38
                                      Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                      Originally posted by mon2
                                      In dc meter voltage mode, do you see a voltage to ground on these lines?
                                      When the power is connected, both lines are equal to 0V.
                                      without connecting to the power supply, the power is 0.019V on both lines.

                                      Comment

                                      • mon2
                                        Badcaps Legend
                                        • Dec 2019
                                        • 13892
                                        • Canada

                                        #39
                                        Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                        Confused. With no power, there should be no voltage.

                                        Can you confirm that your meter is in DC volts mode? Select the lowest voltage scale since these pins should be under 3v3 for each. Then measure again.

                                        Red probe on the pin to measure; black probe to ground. What is the voltage?

                                        Comment

                                        • PITERPENY
                                          Badcaps Veteran
                                          • Jul 2023
                                          • 455
                                          • Ukraine

                                          #40
                                          Re: Macbook A1706. 820-00239-A doesn't see SSD questionmark folder

                                          Originally posted by mon2
                                          Confused. With no power, there should be no voltage.

                                          Can you confirm that your meter is in DC volts mode? Select the lowest voltage scale since these pins should be under 3v3 for each. Then measure again.

                                          Red probe on the pin to measure; black probe to ground. What is the voltage?
                                          there is no voltage on these lines
                                          Attached Files

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