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iPad Air [Generation 5 // A2588] No Power at All

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    iPad Air [Generation 5 // A2588] No Power at All

    Hi everyone,

    My iPad suddenly stopped working and does not turn on and is not detected by a computer. When I plugged it in and measured, it read the following:

    5V, 0.5A, 2.5W (both with and without a battery).

    I opened it up to look for obvious signs of damage but I can't seem to see anything with my untrained eyes. I took my multimeter, set it to continuity and tested the resistors and diodes for any shorts.

    Below, everything circled or boxed in yellow is shorted. Would anyone have any idea what the issue is based on the pictures and how to fix it? I separated the photos into three sections. The first is the entire logic board. The other two are just zoomed in images of the board. Any help or insights would be greatly appreciated. I also included the unedited photos too. (left image is unedited, right image are the circles to locate the shorts I found)

    I would consider myself as a beginner in micro soldering but I've been doing it for about almost 2 years now working on basic stuff like gameboys.

    There is no liquid damage and has not been worked by anyone else yet.

    Thank you

    Attached Files
    Last edited by ntchicken; 09-26-2024, 11:21 AM.

    #2
    So... after I found so many shorted capacitors, I decided rip open the heat shield area and plugged the ipad into a power source and monitor heat. The moment I plugged it into a power source, the 343S00465 chip got EXREMELY HOT very quickly. Additionally, only 1 capacitor near it is shorted. My question is, as shown in the picture, does anyone know if this one bad capacity is in parallel or series? Because if its just that one, perhaps I can just pop it off. Otherwise, I can just replace the 343S00465 IC chip.

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      #3
      Here is a schematic I found online of the A2588. Well.. a picture of it I guess...

      Click image for larger version

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        #4
        Will confirm after my Netflix binge but yes the cap will be in parallel. If it is shorted then it is causing the PMU chip you are referencing to also heat up from this heavy load. Flux and remove this cap with care.

        BTW, review the YT videos on how to use a milli-ohm meter to find shorted caps. It is on my wish list to buy. Will scout for it in my pending travel to Hong Kong in 2 weeks.

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          #5
          Just removed the shorted cap. Still the same. Additionally, there is still a short where the removed bad used to be. I'm guessing its the 343S00465 IC chip? Also which is the VCC main chip?

          Also enjoy your trip to HK! I went earlier this year! was amazing!

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            #6
            On another note, does anyone know the type / model the cap is circled in white and labeled shorted? I removed it and lost it but want to replace it...

            Click image for larger version  Name:	image.png Views:	0 Size:	1.97 MB ID:	3470565

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              #7
              Update.

              So I purchased a thermal cam and a voltage injector.

              I decided to inject 0.5V onto the shorted cap so see what gets hot.

              Click image for larger version

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              After voltage injection I notice everything in purple that was once shorted is no longer shorted!

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              I removed the thing circled in white that got hot, but the same exact thing still gets hot after removal. So I decided to inject 0.5V there too. And now my iPad went from 5V, 0.5A, 2.5W to now 15V, 0.92A, 13.7W when plugged into a power source. However now the area circled in


              after I put the same cap back into where the circled in white area is.

              Also, the PMIC no longer that SUPER hot. It gets warm but as hot as before.

              However...

              Click image for larger version

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              Whats in purple and orange now get hot. Removed the orange and noticed it was broken and whats circled in purple still gets hot. Does anyone know what is circled in orange is? I will post a pic here. Its the black rectangular thing with the white dot.

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                #8
                I am looking to replace this rectangular thing with a white dot and hoping it changes something. Overall, I'm not sure if I am making things better or worse but the iPad went 5V, 0.5A, 2.5W to now 15V, 0.92A, 13.7W when plugged in

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