Help Behold 2 Not Coming On

I had my behold 2 for over 2 years now and all the sudden when I let the phone die and i recharge it, it did a compete charge. When I took it off of the changer, I tried to cut it back on and it didn't come on at all. But if it was to put it back on the charger it will come on, so can anyone tell me what's going on?