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Quinta Geração do Iphone. A Reparação deste dispositivo é correta, requer ferramentas especificas e paciência. GSM/CDMA/16, 32 OR 64 GB/Black or White.

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iPhone reboots after apple logo

I have some very strange problems with my iPhone 4S (16GB), I got it from my friend and he doesn't know why the iPhone can't start anymore.

If I turn on the phone, I see the Apple Logo and after some seconds, the phones crashes and is restarting in a loop, always crashing on the Apple Logo. It looks like something is termenating the phone - is there a problem with the bootloader?

I tried several things:

  • Turn phone in DFU-Mode -> iTunes Recovery -> iPhone is restarting during the Recovery and loops
  • Turn phone in Recovery-Mode -> iTunes Recovery -> iPhone is restarting during the Recovery and loops again
  • Turn phone on and hold the upper volume button -> reboots after some more seconds

*

I tried to restore the IPSW file from Apple Server for iOS 7.1.2.

Here is a video:

https://vimeo.com/107279805

I also can't restore any files with programs like "Wondershare Dr. Fone" - the program needs a phone which can boot up.

So, does anyone know any more tricks or something how I can "repair" the iPhone?

OR: Does it look like a "dead battery"?

Thanks!

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Start with battery replacement.

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Disconnect but don't reconnect.. Use charger to turn phone on

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Amazing! Thank you con - I could turn on the phone with disconnected power flex cable. I then re-plugged it and Button works again - with unplugged battery.

So I tried something else: Power flex cable plugged in again (all cables are plugged in) except the batterie!

I can turn on the phone with the charger and battery disconnected. With connected battery, phone crashes...

Whats wrong here - problem with the charging IC, is it possible to repair?

Thank you very much!

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I would change the battery as battery problem can cause this problem.

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I tried today to change the battery (Repair Kit from ifixit).

Badly the same issue... The phone crashes when I turn it on or when I trie to recover in Recovery or DFU-Mode...

Does anyone know how I can fix this, is this a "normal" problem?

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Would a new logic board fix the problem? Where can I get one?

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Hello try disconnecting power button flex from motherboard then try booting

This worked on a iPhone 4 I did once

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Hi, you mean to disconnect the power button flex cable and then plug it in again? Then reassembling and start the phone?

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i think the issue is in charging IC need to replace it.

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My iPhone 4s is having the same issue but when I disconnect battery and connect with just power flex connected to charger it doesn't even boot while I know that iPhone 4&4s can boot with just power cable connected and better removed. I think it's an NAND \ memory issue. Here is my link for iphone 4s problem https://www.youtube.com/watch?v=66aTUgxP...

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