Try the sop of settings, apps, all, settings, clear data and force close...??? Reboot and see if that does anything.. Clearing your cache through recovery might help.. Though I'm not familiar with the device.. And can't help you with instructions on how to do it..
Another thought. The phone has a removable battery... According to what Google shows anyhow.. Do a battery pull with the phone powered on... Then restart the phone.. See if that might help..