iPad Air 2

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  • tccyo22
    Senior Member
    • Oct 2019
    • 73
    • UK
    #1

    iPad Air 2

    Hi there, I've got an iPad Air 2 which wouldn't power on originally, however after a cap change on VCC Main it now powers on and shows the Apple logo but it will reboot every 150 seconds essentially being in a bootloop.

    I am able to boot the iPad into DFU mode but I am unable to put it into recovery mode no matter what I try. Whether through 3uTools or the plugging the power cable in while holding the home button method.

    So my question is: what is the likelihood the NAND is unfortunately dying or dead? Or has anyone else had a similar problem and might be able to give me a couple of things to try before I write this one off and give the unfortunate news I won't be able to retrieve the data?
    Tags: None
    • reformatt
      Badcaps Legend
      • Feb 2020
      • 1399
      • Australia
      #2
      Re: iPad Air 2

      iPads will boot loop without a good battery, or abscence of gas gauge data.

        Comment

        • tccyo22
          Senior Member
          • Oct 2019
          • 73
          • UK
          #3
          Re: iPad Air 2

          Originally posted by reformatt
          iPads will boot loop without a good battery, or abscence of gas gauge data.
          I'm using a known good battery, that was the first thing we tried.

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 13898
              • Canada
              #4
              Re: iPad Air 2

              Can you measure the current draw?

              Review this thread:

              https://www.ifixit.com/Answers/View/...in+a+boot+loop.

                Comment

                • tccyo22
                  Senior Member
                  • Oct 2019
                  • 73
                  • UK
                  #5
                  Re: iPad Air 2

                  Originally posted by mon2
                  Can you measure the current draw?

                  Review this thread:

                  https://www.ifixit.com/Answers/View/...in+a+boot+loop.
                  Our power supply shows a consistent 5.17v 0.5A draw. I saw that post but it mentions a completely dead battery so would this method still apply in this case? We've charged the known battery in our spare iPad Air here that boots fine and it has plenty of charge in it as we keep it charged ~50% at most times

                    Comment

                    • mon2
                      Badcaps Legend
                      • Dec 2019
                      • 13898
                      • Canada
                      #6
                      Re: iPad Air 2

                      Review this video and every coil.

                      https://www.youtube.com/watch?v=4YA0EVAqu70

                        Comment

                        • tccyo22
                          Senior Member
                          • Oct 2019
                          • 73
                          • UK
                          #7
                          Re: iPad Air 2

                          There was no obvious loose coil I could find, all seem firmly solid in place

                            Comment

                            • mon2
                              Badcaps Legend
                              • Dec 2019
                              • 13898
                              • Canada
                              #8
                              Re: iPad Air 2

                              Review the voltage to ground of the smbus lines on the battery connector. Each should not be a low voltage. Post your measurements.

                                Comment

                                • tccyo22
                                  Senior Member
                                  • Oct 2019
                                  • 73
                                  • UK
                                  #9
                                  Re: iPad Air 2

                                  Originally posted by mon2
                                  Review the voltage to ground of the smbus lines on the battery connector. Each should not be a low voltage. Post your measurements.
                                  Sorry it took a while to get back, I'm not sure if I'm measuring the correct things (still very new to this) but what I did measure had 3.88v on all except 1 which was 2.04v. I really appreciate the help so far
                                  Last edited by tccyo22; 02-21-2023, 09:28 AM.

                                    Comment

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