same problem here, was working fine then just wont switch on even when charging from the wall plug.

Did you find out how to turn on? Mine is doing this too. There is no removable battery

Hey diana. Sometimes my phone also does that. It doesn't want to turn on. What I do is take the battery out then putting it back in. Usually that solves my problem. You can try that. Hopefully it works for you too. Good luck!