Windows 10 only shows Black Screen after reactivating from Standby

Parallels 14 with Win 10 Pro.
I changed several settings for the Tastatur and set windows to Standby after that.
I quited parallels and after restart parallels my windows was in Standby. By reactivating Windows i see only a Black Screen.
Shut down Windows with right mouse-click in the Control-center does not function.

 

@RainerW2 did you try resetting VM?
Is it possible to start your VM in the safe mode?

 

Hy, meanwhile I solved the problem by myself. Shutting down the VM was successful. After restart the VM works fine.