Pre-certified bought in February of this year. Of course it has a 90 day warranty and I am at about double that! This morning went to charge it and it won't charge or turn on. Noticed a brown (almost like a burn mark) tint by the charger port on phone as well as what looks like a small melted area above the port on the back cover. Phone was never left plugged into the charger. Phone will only give a short vibrate when on button pushed. Any thoughts or ideas out there would be greatly appreciated. Is this thing now a paperweight? 