How to revive an unresponsive iPhone that won't switch on
Always plug the iPhone into a high-powered USB source - Firewire won't work
If your Apple iPhone is dead and won't start up at all you can try these various remedies to bring it back to life
If you see the red empty battery icon your iPhone may not be able to work at all until there is a minimum charge in the battery.
If the iPhone's battery is totally drained you may not see the battery recharge image for several minutes. If the display is blank when you plug it in wait a while to see if the icon makes an appearance.
If you see the red 'filler' of the battery icon flash three times and then the screen goes black, it means that iPhone is not receiving power to charge.
Remember: always plug the iPhone into a high-powered USB source such as the mains charger or one of the main USB ports on a computer that is plugged in. Firewire chargers will not work.
To restart your iPhone press and keep holding down the Sleep/Wake button on the top of the handset until the red slider appears onscreen. Slide it across to turn it off then repeat to turn the phone back on.
If the iPhone is frozen and can't be restarted in the normal way do the following:
- Press and hold the Sleep/Wake button and the Home button simultaneously for at least 10 seconds
- If the red slider appears or the screen dims, keep pressing the two buttons until the Apple logo appears.
Click on Settings then General then Reset All Settings
This will perform a reset of all the settings to the factory defaults. The data or content on the iPhone is unaffected.
If all else fails, you will need to perform a full back up and Restore your iPhone.
First of all, make sure you've got the latest version of iTunes. Then connect your iPhone to your PC or Mac and select it when it appears under Devices in iTunes.
If you haven't performed a Sync recently do so now to make sure all your contacts, photos and videos are up to date.
Click on the Summary tab and then click Restore.
If you haven't backed up your iPhone you will be told to do so now. This will back up all the data and settings on your iPhone.
Click on Restore. Wait until your iPhone completes the restore process and resets to the Home screen.