Hi all. I have an old Casio fx-7000GB calculator (I love these old Casio's), where the display is quite dim. Even when I adjust the contrast, it still need to tilt the calculator at an angle before I can see a decent display. The batteries are good, all the functions are working, there are no inoperative buttons, just the dim display.
Is there anyway to fix this problem, or is it just a worn display (if there is such a thing)?