iPhone 4 constantly rebooting, won't stay on long enough to restore

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33 points

iPhone 4 constantly rebooting, won't stay on long enough to restore

My iPhone 4 (4.1 firmware) has started rebooting constantly, never getting past the Apple logo.

Sometimes the "connect to iTunes" logo comes up, and plugging it into the PC tells me iTunes has found an iPhone in Recovery mode, but I can't get it to stay on long enough to Restore, it reboots all the time.

I thought about trying DFU mode, but I don't know how to get it into DFU mode when it's constantly rebooting.

Help appreciated.

MacBook Pro (Mid-2010) Intel i5, 4GB RAM, Mac OS X (10.6.5), Mac Mini (Early 2009), MacBook (Early 2009), iPhone 4, iPad 64GB WiFi only

Posted on Jan 17, 2011 2:29 AM

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Answer 1

markmc78 Author

Level 1

33 points

Jan 17, 2011 3:29 AM in response to markmc78

I eventually got it into DFU mode (I knew because Windows said it found new hardware "Apple iPhone (DFU mode)", and the screen was black).

During the 15 minutes it took in iTunes to download the 4.2.1 update, the phone didn't reboot at all, so I though "great".

I did the Restore, and everything went as it should during a Restore (white progress bar on iPhone, iTunes saying the phone had been successfully restored at the end), but once it was done the iPhone rebooted and went back into the constant rebooting problem.

Any more ideas?

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