Screen frozen on "USB Cable"

My Meizu 6 SP was frozen on the "USB Cable" screen. I did as other members have suggested - leave unit powered on until battery runs down. This morning the unit would not turn on - I attached via USB cable to my computer - unit came to life and showed that it was charging. After several hours, it fully charged and works great.

THANKS!!!

If this happens another time, keep the enter-button (sp)/player-button (sl, ts) pressed for up to 2 minutes. This should (if Hold is off) shut down your m6 properly so that you don't have to empty the battery.