I have my flex 2 for about 3 years now. I happen to forget to charge it for 2 days. I went to put it to charge in the morning, it was just flashing weird things that is not the usual charging flash, did not know what was happening and just left it on the charger for almost 12 hours. When i came back, still no battery, i put it in different charging ports, it went completely off. After few min of giving it some time to rest, i tried charging it again. Now there's just a flashing red light, before was a continuous red light, i cant reset it. Tapping the reset button 3 times not going, holding it in neither. I dont know what to do, i recently bought a new band for it. This was a gift from my mother.
