How can I get my iPhone to turn back on?

“Try to get it turned back on“

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Troubleshooting an iPhone Not Turning On:

The first thing that comes to mind is hardware failure. I see Earlier iPhone models for the device type you’ve chosen to post this with. So, just how old is this device, and what’s the model.

Troubleshooting iPhone Power:

Visit the following links for tips on troubleshooting this...

I. Try what is on this Link: If your iPhone, iPad, or iPod touch won't Turn on or is Frozen - Apple Support

II. Perform a Restart:

Try Force Restarting your iPhone. Save any information that need be. Then perform the restart.

Go Here: Force Restart iPhone - Apple Support

III. A Few Apple Support Sites that May Help:

• iPhone Battery and Performance - Apple Support

• Charge and Monitor the iPhone Battery - Apple Support

• About the Battery Usage on your iPhone - Apple Support

• If your iPhone or iPod touch won't Charge -Apple Support

• About Optimized Battery Charging on your iPhone - Apple Support

• If you see "Your iPhone Battery may Need to be Serviced" - Apple Support

• Use Low Power Mode to Save Battery Life on your iPhone - Apple Support

Do you mean your iPhone won’t turn on? If so, first try a force restart which will determine if this is a software issue.

Force restart iPhone - Apple Support

Then if that doesn’t help this is likely a hardware issue in which you need to visit your nearest Apple Store’s Genius Bar or Apple Authorized Service Provider for diagnostics and evaluation. But it does state you have an Earlier iPhone Model, so if repair is needed, it may be better to put your money towards a new iPhone.

Genius Bar Reservation and Apple Support Options - Apple