So recently, my grandmother's galaxy s4, my mother's galaxy s3, and my friend's galaxy s5 have all "died" because of a weird issue. So they've all used their (new) cellphones for at least one year, and when they turn it off to charge it one day,(while it is off) the next time they turned it on, it simply wouldn't. No vibration or any sign of turning on. We have tried recovery mode etc. And it still won't turn on. Any help please? They have worked fine the day before and now none of the phone will turn on.