My blaze did the same thing on Saturday April 21st, it still syncs, green lights flash, it fully charges. When i reset it, the Fitbit logo comes like normal, but it wont display anything else after that except a battery Icon in the top left corner. Its seems fishy to me, like a software problem. I called tech support they said sorry its out of warranty. I'm not sure if spending $160 on a watch that lasts a year and half is in my family's future. The kicker is 4 of the 6 of us have fitbits, so it will be a bummer to switch everyone to another brand. Tech support did offer me coupon of a new tracker, but said it wont apply to any of the new watches, which is where they fall short. Not sure what else to do.
