I left it to charge overnight. I have tried the suggestions in the forums. I bought a new battery. I tried different power sources. I tried different cords. I took the battery out, pressed power button for 20 seconds, replaced battery, and tried to turn on. I pressed power button for 30 seconds. It hasn't been dropped or damaged, I just got it 6 months ago as a refurbished phone from my phone company so they won't do anything about it, and it hasn't gotten wet. It was working just fine the day before.