Screen is dimming... text burned on screen

I have the Sansa Clip+ 4GB black color. It’s worked over over a year and a half now. I’ve managed to get it wet and still it runs to this day.

Until just this morning, this strange problem occured. It still functions, however when you plug in the player to the computer, the screen that appears (saying connecting) is dimmed. And when you disconnect, you can see that screen ‘burned’ in the background.

What’s going on? Just age?