Something similar with mine. My screen is burning out. getting dimmer by the day, dark lines through the text. upper left corner blank.
Is there a way to get the screen to stay dark while charging??? this has to be the cause. if there is no way to turn it off during charging, that is a design flaw and sansa should replace the screen
Actually, not really similar to the other poster’s issue.
By any chance, are you still under warranty? If so, I would contact SanDisk for a replacement.
The screen will go dark under your screen off setting, when you charge via AC. If you charge via computer, the screen will go dark after an hour (if I remember correctly). Given the long lifespan of the screen, it likely would not make any difference for more than at least 5 years or more.
My hunch is, your screen is defective and has a significantly shorter lifespan than the norm, unfortunately.