Well i joined the club, went to bed with a working phone and woke up with a paper weight, wont charge or turn on. 10 months old LG4. Had to dig out the old LG G until my new phone comes in.
I have the same problem. Sprint is sending me a new one. I was able to heat it up with a blow dryer and backup all my data. Do a search in YouTube to see how to get it to come on. My phone is only 10 months old.