What do you do if your iPhone wont turn on at all?
Cross your fingers and try a hard reset.
To hard reset your iPhone on an iPhone 6S or older, press and hold down the Sleep / Wake button (the power button) and the Home button at the same time, for at least 20 seconds or until the Apple logo appears on the screen.
Why is my iPhone screen black and wont turn on?
A black screen is usually caused by a hardware problem with your iPhone, so there usually isn’t a quick fix. That being said, a software crash can cause your iPhone display to freeze and turn black, so let’s try a hard reset to see if that’s what’s going on.
What do you do if your iPhone 11 won’t turn on at all?
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My iPhone 11, 11 Pro, or 11 Pro Max Won’t Turn On! Here’s The Fix
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What do I do if my iPhone wont turn off?
iPhone Won’t Power Off
If your iPhone won’t turn off, try forcing it off by holding both the sleep/wake button and the home key for about five seconds. Continue to hold until the Apple logo appears. Your phone should now power on and off normally.