HP Prime Washed Out

[chazzs]

Help. Right in the middle of class today, my Prime became washed out. Very difficult to read anything on the screen; the soft menu buttons are light gray with horizontal lines (not black), and the highlighted menu bars are nearly non-existent (can't see when an option is selected). I've reset the calculator and changed the backlight setting, but neither of these changes the washed out appearance. Is there another contrast setting I'm overlooking, or did my screen go south.

Thanks for the help.

CHUCK