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iPhone 7 plus received for a screen replacement

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  • eDigitCom
    replied
    Final update I hope


    Again fitted another new screen

    I have the phone on test for the last four days by using it myself and had no issues with it at all all this time

    Returning it to the customer tomorrow.


    Something to keep an eye on what a faulty screen can do even if the screen looks fine on the 7 plus

    Leave a comment:


  • eDigitCom
    replied
    Its not the battery Jessa or connection

    Went again on me

    Thinking it may be a very poor battery but it is a very good one when tested

    I looking at the screen again that they may be an issue with this screen also

    Have another screen fitted temporally whih its home button

    This working away fine so far overnight




    Leave a comment:


  • eDigitCom
    replied
    Yes you are very correct about the battery not connected will behave the same

    I tried it myself on an iPad just now I am repairing and it does exactly the same

    The battery was connected but may not have had a good connection like a bit of dirt


    The charging current OK Not Audio IC issue

    I hold on to it for a few days myself to see how it goes but I say you are totally correct

    You learn something new every day


    Brilliant You cannot beat experience

    Thank you very much Jessa




    Leave a comment:


  • Jessa_the_Professa
    replied
    this is all rule number one stuff most likely. A phone that doe s not have a good connection to the battery will boot loop while the charger is plugged in. Same thing if you have damaged the battery flex from all this troubleshooting.

    Assuming it consumes normal charging current then for now Id assume that you had given it back to her with the battery not connected well to begin with. You can try rebooting it a few times to rule out audio ic and check charging current consumption
    Last edited by eDigitCom; 08-03-2018, 02:24 PM.

    Leave a comment:


  • eDigitCom
    replied

    Hi Jessa back with this one again about it boot looping
    1. I give the customer back her phone
    2. Approx. 30 minutes later I got a phone call telling me the phone at turned off and once the charging cable connected it boot loops
    3. I got the phone and it was doing exactly what the customer said
    4. I disconnected the camera assemble flex cable from the logic board and turned the phone on and this time it stayed on the apple logo
    5. I disconnected the battery and powered up the phone again and this time no issue powering the phone up
    6. I reconnected the camera flex cable and again no problem powering up
    7. At present I am using the phone myself to test and now have it for 12 hours.
    8. One issue did happen during this period the Assistive touch came on saying the home button may need cleaning. The home button was now not working
    9. I disconnected and re-connected the battery and on power up all ok again
    I just think now if may not have been necessary to remove the camera assemble at all to get it back up to boot. Maybe just by disconnecting and re-connecting the battery it more then likely would have booted again to normal

    Is it possible that there is an issue with this screen also??

    I made a video when I was working on the phone this time to show you, which maybe give you a better idea what is happening
    The link to the video is below

    Any advice please


    Thanks


    Jerry

    http://www.edigitcom.com/7plus/
    Last edited by eDigitCom; 08-03-2018, 10:56 AM.

    Leave a comment:


  • eDigitCom
    replied
    I will have the phone back on Wednesday to check Jessa

    I think maybe the fcam assemble but will have to check

    The reason I pointing it this area as this happened to me at one stage and when i disconnected the fcam cable frrom the logic board it came back up agaiin


    Thanks very much for the detail information about

    In this area you are genius and one of the best teachers i have come across

    Thank you

    Leave a comment:


  • Jessa_the_Professa
    replied
    Restore (and update) are always a last resort for folks working in our field. We deal primarily with hardware problems—phones that have been dropped, water
    damaged, bent etc. The internet overwhelmingly prescribes restore as a cure all tonic and first step of troubleshooting because it is easy for DIY folks and it can cure software problems in phones that have no hardware problems.

    But you can’t fix a hardware problem with a software solution.

    If you have a phone that has a hardware problem, then asking it to restore or update is asking for trouble. The phone may end up nonfunctional and you will have lost clues that you rely on. Take audio ic for example. A phone with audio ic problem will have greyed voice memos and that’s a big clue. Ask it to restore and it will be error 4013 and in recovery mode and will not boot at all—a phone like that is much harder to figure out.

    remember that restore and update do a system check on many systems that could have a problem that no one cares about—like Apple Pay. If you had left the phone alone it would have worked fine just with no Apple Pay. But asking it to restore means that it will never boot again because it can’t pass update/restore. If a phone has any suspicion of hardware problems rule those out before doing update/restore.

    here in this very case we see another example. This phone had a common hardware problem—bad screen. Changing the screen and the phone would have booted up as normal was the only thing it needed. But we got into several days of panic and troubleshooting because it was asked to update when there was no chance of software problem.

    all that is solved and we learned that update/restore is an important and necessary tool but one to use judiciously.

    why is it boot looping now? All repairs start with rule #1.

    Leave a comment:


  • john
    replied
    I’m assuming you checked for connector damage on both ends and tried another camera assembly from a parts phone (never use those aftermarket ones as they are all junk). If it’s not that I’d start by probing the board connector and checking against a good board values. If you don’t have that you can use zxw values but in my experience they are off quite a bit and could lead you down the wrong path.

    Leave a comment:


  • eDigitCom
    replied
    Thank you very much John Really appreciate your help

    I felt you should not do a DFU until you are sure you have eliminated all hardware issues


    Would you have any idea John what would be causing the problem it is now having

    Leave a comment:


  • john
    replied
    I was sure this was your problem, don’t understand the fear of a backup and DFU restore as stated earlier.

    Leave a comment:


  • eDigitCom
    replied
    Doing the DFU solved the issue the finger print works fine Thanks very much to John and Jessa

    Why does an update or restore cause this issue if you do it with a fault on the phone

    I think you will know if this is the case if on power-up if you not receive the error "you cannot active the touch id) If this message appears then you have a hardware issue

    Now another issue occurred

    After returning the phone to the customer she contacted me that the phoned turned off and putting the charging cable on it it loops on the apple logo

    When repairing the phone this happened to me also after connecting the Proximity cable to the logic board When I removed the cable it power up OK Once connected back again was fine so I thought it was some glitch in the software

    Now it seems not


    Now thinking that maybe an issue with the camera itself The screen around was this area very badly damaged

    Would a bad FCAM cause such an error to accrue??


    Thanks

    Jerry

    Leave a comment:


  • eDigitCom
    commented on 's reply
    It was Jessa
    I pointed this out in my first message I updated thinking that this might solve the problem but has you said had the opposite effect

    Why in this case is an update the same has a restore and unable to create a the Finger Print ID
    Last edited by eDigitCom; 07-22-2018, 06:36 PM.

  • Jessa_the_Professa
    commented on 's reply
    When did you do an update----was it an update with the bad screen? If so, that is the same as restore and the cause of the problem.

  • eDigitCom
    commented on 's reply
    Yes I did do an update

  • eDigitCom
    replied
    OK Jessa will do

    Thank you

    I did an update OK

    You told me to to do a Hard Reset which I did also
    Last edited by eDigitCom; 07-19-2018, 08:23 AM.

    Leave a comment:

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