IPHONE 14 will not turn on

If your iPhone 14 is completely discharged, it may take some time from the time you connect your charger to your iPhone turning on again. Also try a different charger and a different Lightning cable.

Give it some time and see if it starts again. When the iPhone has been connected to the charger for 10 minutes and if it has not started, try to do a Forced Restore:

1. Press and quickly release Volume Up

2. Press and quickly release Volume Down

3. Press and hold the Side Button, the phone will restart. Release when you see the Apple Logo.

Find more information here:

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

If your iPhone won't turn on or is frozen - Apple Support