See also:

Blank Screen
The message center display will be blank after cycling through all of the Info menu items. ...

Turning off speed control
To turn off the speed control, press OFF or turn off the ignition. Note: When you turn off the speed control or the ignition, your speed control set speed memory is erased. ...

Resuming a set speed
Press and release RESUME. This will automatically return the vehicle to the previously set speed. ...