I have had my Fitbit blaze for about 4 years and have never had any issues. Today I put it on and it was working. I then went to connect it to the app to go for a run and track my miles, but the screen was black. I knew it wasn’t dead because I just charged it the other day. But I put it on the charger anyways and went for my run. When I came back the screen was still black. If I press the button that is on the side by itself, I can see the screen change colors to a lighter black like it is wanting to turn on. But it doesn’t show anything.
