HTC Sensation 4g. I have had a similar issue before although the phone turned on after about a minute of charging. My phone died while I was sleeping and went to charge it this morning. After about 30 minutes of charging (LED works while charging, and is now yellow/green instead of red) I attempted to turn it on. It vibrates once as it usually does when it turns on, however nothing appears on the screen, and the LED turns off (as it usually does when you power on). Waiting 5 minutes and nothing happens, have to remove battery and put in again to continue charging. Thank you for any input in advance!