i have had the s1 for about a year. the other day it was working fine and all of a sudden the unit turned off and now just the bluetooth light blinks. if i plug a charger in (have tried home, car, and usb sources) the charging light will come on. i tried connecting to the unit with bluetooth via cell phone but the phone did not see it. there is no display that comes on at all just the bluetooth light blinking. Any ideas????