iPhone won't power on after repair.

Question

iPhone 4S

iPhone4S是第五代iPhone。网络制式为GSM/CDMA ，存储容量有8GB、16GB、32GB、64GB可选，机身颜色有黑色、白色可选。维修iPhone4S是容易的，需要耐心，用到的工具有螺丝刀、撬棒等。

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Jack @jack29559

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发帖于: 2013年7月21日

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iPhone won't power on after repair.

I had and iPhone 4s for a while, when I dropped it and broke the screen. I would still power on as I could see some lighting on the screen. I ordered a new screen for the 4s. Following a tutorial I did the replacement correctly and with the right tools. After doing the repair and reassembling the phone correctly, the phone would not power on. I have disassembled and reassembled the phone many times ensuring all the cables were connected properly. I've tried to charge the phone with no result. I have tried to connect the iPhone to my computer also and it is not recognized in iTunes. I have also tried to hard reset the iPhone, nothing works. Help please?

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Also I have tried to hook the old screen back up and theres no lighting on it anymore, i have check and all the ribbon cables are fine.

由 Jack 完成的 2013年7月21日

UPDATE: the iphone will go into DFU mode and is recognized, do i have to update to get the phone to start?

由 Jack 完成的 2013年7月21日

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george harris @georgeharr10073

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发帖于: 2013年7月28日

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HI was your phone running IOS 5? The new screen units out of China have a new IC fitted on the lcd. If this new type screen unit is fited to a phone running ios 5.1.1 for instance then not only doesnt the screen work at all but the phone wont boot up either! I have had this problem with new 4 and 4s screens from 4 different sources , im lucky that i keep a fair few and have been able to use old stock screens or have been able to update the phone software on such phones using the old screen unit before i change screen. You can verify that this may be your problem, unplug both lcd and digitizer plugs . (disconnect battery first , then plug back in after)then plug phone into p/c after awhile the phone should be recognised by itunes etc. If this is the case your old screen probably totaly failed when removing. If you have no other screen units available and you think you were running ios 5 etc and you were not using it because of jailbreak etc. IF you havnt a backup of your phone then you still should be able to get one without the screen plugged in, if you had a password on your phone it would be harder , you could try just pluging digitizer plug in and guessing where the keys for your password are so you can get passed it to make a backup.

You should be able to get software update with screen unit disconnected by doing this. Make sure phone is off by briefly unplugging battery then plug back in. Hold home button in and connect to p/c via usb cable. Wait to the phone is detected in recovery mode. Restore the phone. When it says its complete, disconnect from pc . Unplug battery, connect screen and plug battery in see if you have solved your problem. Good luck.

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@George Harris, I have really been clueless about this whole thing untill now, that was somehing completely unknown to me, yes the phone is on an older version, most likely ios5 because it was infact jailbroken, I did manage to get the old screen to light up and the phone was recognized, but when i connected the new screen nothing would happen, i was under the assumption that i had bought a faulty screen. I have tried to guess where the passcode was, with no sucess. I figured id install a new screen before i risk disabling it. Im just going to update the phone and try the new screen after, id rather have a working iphone wiped clean than one i cant use. Ill try this probably tomorrow and get back to you on the outcome, thanks again

由 Jack 完成的 2013年8月11日

Updating fixed mine.

由 Jack 完成的 2013年12月3日

How did you fix it mate ,I have the same problem

由 Mohammed Arif 完成的 2014年1月8日

This advice was brilliant, thank you so much, I thought that the phone was dead forever.

由 Michael Roseveare 完成的 2014年1月12日

Worked for me!!!

由 Rene Jeddore 完成的 2014年3月6日

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Also I have tried to hook the old screen back up and theres no lighting on it anymore, i have check and all the ribbon cables are fine. — Jack
UPDATE: the iphone will go into DFU mode and is recognized, do i have to update to get the phone to start? — Jack
@George Harris, I have really been clueless about this whole thing untill now, that was somehing completely unknown to me, yes the phone is on an older version, most likely ios5 because it was infact jailbroken, I did manage to get the old screen to light up and the phone was recognized, but when i connected the new screen nothing would happen, i was under the assumption that i had bought a faulty screen. I have tried to guess where the passcode was, with no sucess. I figured id install a new screen before i risk disabling it. Im just going to update the phone and try the new screen after, id rather have a working iphone wiped clean than one i cant use. Ill try this probably tomorrow and get back to you on the outcome, thanks again — Jack
This advice was brilliant, thank you so much, I thought that the phone was dead forever. — Michael Roseveare

Michael Roseveare @michaelros17798 声誉积分: 13 1 · Answer 1 · 2014-01-13T15:08:37-07:00

Michael Roseveare @michaelros17798

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发帖于: 2014年1月13日

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Hi Mohammed

I used the advice above

Attaching the digitiser only and having powered down, powered up, swiped to unlock and then used my pass code by guessing the location of the numbers. Having powered up and unlocked the phone was recognised by my laptop so I updated the iOS to the current one. This took ages but once done I then powered down, reconnected the screen to the mother board and powered up the phone. To my amazement and joy the screen lit up so that I could swipe and unlock.

Hence my post

Good luck. If your phone is not knackered and needs the most current iOS it will work with a good deal of time and patience.

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Yasserm10 @yasserm10 声誉积分: 1 · Answer 2 · 2014-06-05T20:56:48-07:00

Yasserm10 @yasserm10

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发帖于: 2014年6月5日

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You are great! Thanks so much for the tip :)

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solomonfaction @solomonfaction 声誉积分: 1 · Answer 3 · 2015-06-24T02:46:16-07:00

solomonfaction @solomonfaction

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发帖于: 2015年6月24日

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Have d same problem. Am going to try it and post result. Solomon.

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It worked like magic. Thanks very much. I waz already panicking.

由 solomonfaction 完成的 2015年6月27日

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Kaleb @kaleb6699 声誉积分: 1 · Answer 4 · 2015-06-30T00:15:50-07:00

Kaleb @kaleb6699

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发帖于: 2015年6月30日

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To add on to the original question.. I replaced the screen and it was working for a while but when i clipped the screen all the way into my phone, I tried testing it again and it wouldn't light up.. It still gets battery power because it vibrates and I can still connect it to my computer..

Would restoring it work? Or did I ruin the wires for the new screen?

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iPhone 4S

iPhone won't power on after repair.

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