HT1438 my iphone 4 just won't power up, it was half battery when it shut down, have tried charging or connect with my MacBook still nothing happen?

my iphone 4 just won't power up, it had half battery when it power off, tried connecting to my Macbook still nothing happen, what's the reason?

Try holding both the on and off buttons(top and bottom of phone) at the same time and keep holding until the apple sign comes up then let go and wait, worth a try.

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    my iphone 4 has switched off by itself and won't switch back on. The battery wasn't dead, I have tried restarting it and have tried to put it into recovery mode but it still won't switch back on?

    Try a reset, hold down the home/sleep button together until you see the apple logo and then release, then wait for the phone to boot back up.

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    the iphone 5c still has problems with battery life and shuts down after complete charge.  this happened after 8.1 update, I tried every way to shut things down, still no luck.  what can I do next?

    I did a soft reset, and I went to the discussion and turned every down or off.  This is definitely a hardware problem.
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    Try to backup and restore you device in itunes...restoring the device is like removing the iOS software off the device and re-add in a newer software, after you have restore you device, MAKE SURE YOU SET UP YOUR DEVICE LIKE A NEW DEVICE, DONT NOT RESTORE FROM BACKUP!!... give the device a chance to use the newer software and see if the issue still persisting, if the issue still on going then its would be a hardware issue.
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    phone 4 just turned itself off, won't turn on again - sleep/wake button hasn't worked for a while - tried charging (even though it was 50% charged when it shut down) and that makes no difference....either via usb to computer and direct to wall socket. Any suggestions...other than heading off to the genius bar tomorrow?

    Well, the sleep/wake button is also the power button. If you cannot use it to turn on, then you cannot use it to perform a reset by holding it and the home button together until you see the Apple logo.Those are the only two ways to turn the device on. You can try letting the battery go completely dead and then trying to plug it in. After it has charged for 20-30 minutes, the device may come back on. But, without the sleep/wake button, there is no other way to turn the device on or off.

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    About 45 minutes ago my iphone 5S just shut off on its own. I have tried charging it only to have the white screen with the black apple showing. How can this be repaired?

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    Problem solved... just saw the answer in another thread... https://discussions.apple.com/message/13110222#13110222

  • I WAS USING IPHOTO AND MY POWER WENT OUT. WHEN I TURNED THE IMAC ON I COULD NOT OPEN IPHOTO! JUST KEEPS AKING TO RELAUNCH. TRIED TO PUT RECOVEERIND DISC IN BUT STILL NOTHING!

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    - iOS: Troubleshooting Wi-Fi networks and connections
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    http://www.macblend.com/how-to-calibrate-your-mac-iphone-or-ipad-battery/
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    Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
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    Apple Batteries - iPad http://www.apple.com/batteries/ipad.html
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     Cheers, Tom

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