I was in the sound menu eith the low mid high and turned around the knobs until the bars were not miving and more.
then i was in the normal keyboard mode and the knobs did not do andthing anymore.
so i wanted to turn off and on the unit.
but its not turning on and more.
the screen is black and the charching lights are lighting up one after the other from bottom to top.
i tryed pluging it to the charger and turn it off and on again but it stays that way.