iPhone 3g "almost dead" after back housing replacement

Discussion in 'iPhone Tips, Help and Troubleshooting' started by iphonoholic, Jun 20, 2010.

  1. iphonoholic macrumors newbie

    Jun 20, 2010
    After a "successful" replacement of the cracked back housing on my iPhone 3g, it won't start up.

    Here are the symptoms:
    - when not plugged into any power source it's just a black screen, neither of buttons combination (wake, wake+home, 10sec-60sec...) don't work, it stays black
    - when connected to the wall charger, after pressing the wake button, the silver apple shows up for exactly 15 seconds and the screen goes black; again no other combination of buttons have showed any result
    - when connected to the USB on a laptop: pushing the wake button the screen just blinks and goes dead with the LCD's pixels "melting down", as if it was forced to shut down.

    I've already tried to go through iTunes (start iTunes, connect iPHone while pushing the Home button), it doesn't recognize it.
    I tested the battery with a meeter, apparently it's in a "good health", it shows 4.09V though, but I guess it's in a normal range.

    I'm a handy dude, having done such kind of surgeries a gazillion times (not on an iPhone though), so I'm aware of any physical damage I could have caused, however I am tempted to believe that this is not a hardware issue (short circuit, bad contacts etc), as the phone shows some signs of life.

    Has anyone have ever experienced the issue described above (i.e. Apple logo for 15sec and then black screen)?
  2. iphonoholic thread starter macrumors newbie

    Jun 20, 2010

    I was able to put it in DFU mode... iTunes recognized it. The update is being downloaded from inet. Will keep it posted.

    The iPhone could not be restored. An unknown error occurred. Error 1601

    That's what I get

    Any ideas anyone?
  3. hammeros macrumors newbie

    Jul 16, 2010
    I have the same problem any ideas?
  4. iphonoholic thread starter macrumors newbie

    Jun 20, 2010
    I took it to a technician yesterday. Will see what's his verdict and will post it here.
  5. IphoneRevivers macrumors member

    Jul 21, 2010
    Even though you tested the battery , this really sounds like a battery or battery connection to board issue . The way you describe your issues are common when a battery is not present . What you might want to try to do is re sit your battery into the back housing and make sure the battery is aligning correctly with the bottom of the board . This is a whole in the battery connector that should sit the battery in there correctly , then you have to place the board in correct . However to test you only need to insert one screw into the board which is the one above the do not remove sticker . you can then plug it into itunes or just put the front assembly back in and see what happens . At the end of the day , if this still happens , even if the battery is showing volts try replacing it and see what happens .
  6. reMacs macrumors newbie

    Aug 6, 2009
    botched iPhone 3G back cover replacement

    Something very similar happened to me last night.

    Here's what happened: I gutted my 3G iPhone 8GB last night to install a new candy apple red back housing. When I purchase the iPhone a couple weeks ago, it had a broken home button and cracked back housing, so I thought this would give me a chance to escape my Macbook repairs and branch into iPhone repairs, too.

    So, I purchased a new home button and back cover from eBay. I then followed iFixit tear down instruction to remove all components from back cover, and then reinstalled them in reverse order into the new back cover.

    I then proceeded to tear apart the screen assembly to install the home button. Despite the home button be a little crooked, and that it doesn't really click properly, everything went back together okay.

    Then after I attempted to reinstall the LCD assembly, the iPhone would not display anything. However, the vibrate button activates the vibration mechanism (with and without LCD assembly attached), so I know logic board is functional (or do I?) Also, when the LCD assembly was off, I removed the logic board connecter and reinstalled that repeatedly. When I did that, the vibration mechanism momentarily sounded.

    Also, I did tinker with the on-off button and home button combo after assembly. Nothing turned on, though.

    A friend suggested a new LCD. So, I figured I'd try swap it out with my wife's iPhone 3G 8GB assembly (nobody tell, please!!). Then after taking the LCD assembly off, installing another one still nothing displayed. Thankfully, when reinstalling my wife's LCD her LCD displayed as original.

    So at this point is what I know:

    1) The iPhone was fully operational before disassembly (minus home button)
    2) The vibration switch activates
    3) The vibration switch activates when removing/reattaching motherboard connecter (the silver attachment).
    4) I got a cool looking back housing, but no iPhone yet!! LOL!

    Questions I have a this point:

    1) Is this a software or hardware related issue?
    2) Is there a ground somewhere in the back cover assembly that failed to touch/connect when installing new back cover?
    3) Is there some sort of reset I need to do after disconnecting motherboard?
    4) Do I have to follow the numbers when dislocating/reattaching connectors?

    Any assistance would be helpful! Thanks
  7. JFreak macrumors 68040


    Jul 11, 2003
    Tampere, Finland
    I have almost the same problem. After reassembly, the display does work but its backlight is dead. Looking closely, I can see that the thing operates properly, only with zero brightness. And on another note, the earspeaker is dead but calls can be made using the bottom speaker.

    Very strange...
  8. nathanthepilot macrumors newbie

    Sep 1, 2010
    Same problem

    Hi, I have the same problem. Did anyone come up with a fix for this? I looked at the link at the bottom of the thread, but haven't tried anything yet. Just wondering if anything worked. I'll post up update if I find a fix. I thought I was the only one with this EXACT problem. All after I replaced a stupid case! :eek:
  9. kimyr0501 macrumors newbie

    Sep 28, 2010
    My Problem Solved!

    Hello I fixed my iPhone!

    I kind of want to explain my story so if you dont want to read all these junks
    just read the bolded part :)

    My iPhone 3G's screen was broken(? not really) during housing backcover,

    I was replacing my back cover and battery at the same time

    but the back cover that i bought was too poorly made from china

    So in the middle of replacing I just decided to stick with my old back cover
    however still changed my battery

    after I was done tried to turn my iphone on

    but nothing was on my screen

    still strangely it was on and I could tell pretty much every thing else was working fine

    I tried

    flicking vibration button
    calling my self with my brother's phone
    connecting to computer

    In my case all of these worked

    So i thought my Line to LCD might be broken
    or it may just not connected well

    so i reconnected the 3 LCD lines but still not working

    now i got really worried still rational

    I took off the screen and looked at it closely
    and tried to find the difference between video and photos that I used for

    and find out that I miss put one screw before the mother board

    which means it was not connected

    so i took off the mother board and took out the crazy screw
    put motherboard back in and re screwed everything back!

    and VOILA!

    my iPhone is alive again!


    I will never take my iphone parts off

    I am attaching the site i referenced for housing
    Even though it is in Korean (which i understands)
    the photo qualities are the best I could find on web


    My problem was that on 7th photo from the top
    one of the red boxed screw was not attached to the main board

    which was the one right above numbered 5 screw...

    I hope someone else get their iphone fixed with my answer!
    I was going nuts when my iphone was dead!!
  10. berardi.mitch macrumors newbie

    Jun 3, 2011
    kimyr0501 thank you!

    i followed what you said, and it fixed my iphone! i cant thank you enough!:D:D:D

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