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Thread: 3g stopped working after repair. help me diagnose plz!

  1. #1
    Default 3g stopped working after repair. help me diagnose plz!
    i replaced the screen and lcd of a 3g that worked like 2 weeks prior (i plugged my screen/lcd in it to make sure the phone worked). now after the repair the phone turned on for a minute and then just shut down. i thought it was a problem with the lcd, but the phone wont even show up in my itunes. any ideas what to check out? i have a backup 3g that i can swap parts with to help me figure this out.

  2. #2
    iPhoneaholic plcrules's Avatar
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    a friend had a problem like this but it happened 2 him at random u should try a dfu restore with the lcd in then if the restore works put ur digitizer in and put it back together

  3. #3
    How do I put it in dfu mode if It won't turn in or show up I iTunes

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    iPhoneaholic plcrules's Avatar
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    hold the home and power at the same time till the apple logo shows up then keep holding till it goes away win it does go away hold the home button

    (keep it pluged it it helps cuz then u no the second u get it)

  5. #5
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    Quote Originally Posted by ajtoce View Post
    How do I put it in dfu mode if It won't turn in or show up I iTunes
    The fact it initially turned on, then off does not sound encouraging to me. However, unless u accidentally zapped it with static electricity or plugged the cables in wrong, it might just be loose faulty connection. You've probably thought of this already, but check out possible bent pins, use an ohm meter to verify the pins are solidly connected and making contact with the cable.

  6. #6
    Plcrules...the phone DOESNT turn on at all bro. And mes, whic connection should I check? It's not a problem with the LCD because I pluggeD in a working LCD and it still didn't work.

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    If a known working LCD doesn't work, then check deeper. Could be you zapped the motherboard. Check those cables carefully.

  8. #8
    ok, so i swapped my lcd/touchscreen bracket with this one off the broken phone, and it didnt work on my good phone. so i swap them back and now both phones are doing the same thing. no response to anything, wont charge, wont show up in itunes. i was JUST using my phone before i swapped screens. this is bizarre what the heck is going on? I have plenty of experience with replacing parts on these things, i cant figure out what the heck i did to make them crap out like this.

  9. #9
    iPhoneaholic plcrules's Avatar
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    u said it turns on and the apple logo shows and then it turns it self off u can get into dfu with that
    or did that change?

  10. #10
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    Beats me. I hope that now, both LCD's aren't damaged.

    Good luck.

    Let us know how it turns out.

  11. #11
    Quote Originally Posted by plcrules View Post
    u said it turns on and the apple logo shows and then it turns it self off u can get into dfu with that
    or did that change?
    thats what it did the first time, then after it turned off it wouldnt turn on and its been that way since.

  12. #12
    OK, so I've heard that a cheap replacement lcd can have smaller pins than normal which may cause your motherboard to short out. Can anyone verify this, or maybe have any idea as to the validity of this?

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