Bear in mind that there could be a problem with the wall charger or the cable, so if charging isn't doing the trick you should try the same routine with a different plug, and with a borrowed or spare cable.
In any case, there are several steps you can take to resolve the issue with your i Phone or i Pad, and we'll work our way through those steps in this article.
(If you've got problems with your Mac, on the other hand, here's 10 steps to take when your Mac won't start up.) As a note: this is a guide to mysterious situations where an i OS device refuses to turn on as a result of problems unknown.
We would suggest going into an Apple store or contacting Apple.
If on the other your device now switches on but doesn't get past the Apple boot logo, follow the steps below. " might be a hackneyed phrase, but this principle is the default go-to for those stuck in a bootloop.
Have you got an i Phone, i Pad or i Pod that refuses to turn on or appears to be 'bricked'?