When I turned on my graphics calculator there were a lot of dots on the screen and - - - which kept flashing. If you press 'graph' a line will also appear. Other than that it won't do anything and if you press buttons, more dots appear. Yesterday it was doing this but all of a sudden just disappeared and it worked perfectly. Today though it is doing it again. Do you know what could be happening?
Answers & Comments
Check the battery and try resetting it.
Robert