I've had my Galaxy S3 for a little under 6 months, and until now everything has been fine, but then last night it just suddenly stopped working. I have it plugged into a charging cradle overnight, and when I went to sleep the battery was at about 16%. I woke up this morning and the phone was off, and completely unresponsive to the power button, or any combination (e.g. power+home+vol up), just like the battery was dead. I tried taking the battery out and putting it back in, and I've tried with a different battery that I know is fully charged, but no luck. When I plug it in to charge through the cradle, or directly, the charging light doesn't even come on. It's rooted, but I'm not running a custom ROM. So, is there anything I can do? Or am I resigned to taking it back to the shop - if I do will the fact I've rooted it affect anything; presumably they can't tell if the phone won't even power up?