Chosen Solution

My calculator has worked for two years. Now, when I turn it on, the numbers/whatever on the screen will only appear if I shine a flashlight on it, hold it up to a window, etc. I don’t know how to solve this, and I have an exam next week. Help would be much appreciated.

@ellegogh sounds like your display no longer has a functioning backlight. Most likely this could be repaired by replacing the display. double check your TI model number and verify that this is a TI-300