I have a Sansa Sandisk. The screen just turned white on me today. I can’t turn it off either. Even when I turn the dial, there are no stopping bumps. I thought of taking the battery out and putting it back in but I don’t see how to take it out.
Hmm. I held the on/off button a REEEEEEEAAAAALLLLLYYYY long time and it finally turned off. It was fine when I turned it back on. This all happened when I was trying to upload a video that I made myself. It didn’t want to accept it and then it went white. Lifeless. Well, I’m not going to stop uploading. I’ll try it again. I might be back. 
That’s called a reset. Whenever the player seems to freeze up, alwyas try that first before panicing. 20 - 30 seconds should do the trick. 
