Okay, so this morning I went to look at my phone and it wasn't powered on. I thought maybe I hadn't plugged it in, wrong. It was plugged in all night. Maybe it had a bad connection? Possibly, however I should still see it start charging when I plug it in with a different charger. Nothing happened though. Tried turning the phone on several times and got nothing. The phone itself was very warm, like I had been using it while charging, but I'd only just woken up so obviously I hadn't been using it. Anyway, I finally got it to turn on via a soft restart (pressing and holding the power button for 10 seconds). However I want to know what could have caused this and if I should be worried about it happening in the future?