HT4623 just updated my iPhone 4s to ios6, now my phone won't turn back on. The apple logo comes on and sits then shuts off. I have held down the home button and on/off switch several times to reset, but same problem persists.

just updated my iPhone 4s to ios6, now my phone won't turn back on. The apple logo comes on and sits then shuts off. Then comes back on and just sits.I have held down the home button and on/off switch several times to reset, but same problem persists.

Place iPhone on Wall Charger for at least 10 minutes. Then keep on charger and Reset, hold both home and power buttons until the iPhone begins to start, this can take about 20 seconds of holding both buttons while on charger. If still problem, open iTunes 10.7 on computer, connect iPhone to computer with USB Cable, hold both home and power buttons for about 20 seconds until iTunes recognizes iPhone in Recovery Mode, then click Restore button of iTunes. If still problem, try DFU Mode Restore, here are the steps. Open iTunes on computer. Connect iPhone to computer with USB cable. Hold both Home and Power buttons, after exactly 10 seconds release the Power Button, keep holding the Home button until iTunes recognizes iPhone in Recovery Mode, usually about 20 seconds time. If the iPhone screen is black, blank this is DFU Mode. Click the Restore button of iTunes. DFU Mode can be difficult to enter sometimes, just keep trying. DFU Mode is a black, blank screen with iTunes saying Recovery Mode. If still problem and there is Warranty or AppleCare make Genius reservation and take to Apple for resolution.

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