Model no F786 aigo. The screen is fro...

Model no F786 aigo. The screen is frozen on the time screen. When I press button to turn off - it does not happen. It dropped on the floor at work whilst in my cycling jackect and when I turned on when cycling for ride home - was fine but since then I have not been able to turn it off and it is stuck on the time screen - I can't even see if the buttons pressed have an effect as stuck on the time screen. I think it is in screen protection state.

Pressing any buttons does not seem to have an effect.

Would be grateful for any help