Why I’m able to set the backlight of the PCD7.D4xxV VGA panel in that way that the screen is totally black?

Under certain condition’s it’s possible that the user can change the backlight dimming of the PCD7.D4xxV VGA panel in that way that the screen is completely black and it’s no more possible to use the display.

With the FW 1.18.49 or later it’s no more possible that the user can set up the backlight dimming in that way that the display becomes totally black.