How To: How to Fix Your Dead iPhone 4S This video shows what steps you can take when a non-responsive iPhone will not turn on. Read more about how it work, as well as various tips for repairing it if you have an issue.
Understanding Force Restart
Force Restart: Force restart or hard reboot, includes initiating an automatic system reboot by disconnecting and re-establishing power to the handset. Note: If you reset your device, all data will remain; only the device’s operating system is refreshed.
How to do a force restart
Press and Hold Buttons: Press the Home button and the Sleep/Wake button (commonly referred to as the Power Button) simultaneously.
In the other case you wait for the Apple Logo to appears holding both buttons until the logo comes out. That means the device is being rebooted.
Alternative Restart Method
If a force restart fails, another method to try is—
Power Off the Device – Long-press on the sleep/wake button until you see “slide to power off. Slide to turn off the device.
Switch It On Again: Once the device has gone off-Sleep/Wake tap and carry on holding it for a few seconds longer until you see Apple logo.
Additional Troubleshooting
If your iPhone 4S is still unresponsive following a force restart, some of the options below might be relevant.
Battery – make sure the device powered up. Attach it to a charger and try to reboot again after about five minutes.
1-Hardware Issue: If something is found to be persistently not working right then it results to a hardware failure ie something like a battery or mother board, screen algo gone bad. In this case, it is better to contact Apple Support and go to a service center.
Conclusion
A force restart is one trick but you may have to consider studying the health of your iPhone 4s battery, just in case if there are hardware issues. Hopefully, with those steps completed your device should be working correctly once more.
