The battery on my S4 died overnight. I plugged it in this morning, and turned it on. It keeps looping through the switching on screens, and won't ever get to my home screen. I thought maybe I turned it on before the battery had enough juice and it was a glitch, so I pulled the charger, and let the battery die out; plugged it back in, and waited until the battery icon was at half full, tried turning it back on, and the same thing happened again. I just pulled the battery, and am hoping that helps - has anyone had a similar experience, or know what to do to get it out of this loop and have it actually turn on?
Do PLENTY of reading first, BUT the info you seek is here.....
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I ended up having to do a hard reboot - sucks! Thanks for posting that link :)