Stuck My SanDisk e250 2GB player will not respond to any command. I turned it on this morning with no problem at all and an hour later when I tried to turn it off, neither the center wheel nor the display screen would light up. I cannot turn it off nor get it to display. There is no response to holding the menu button. It has not been damaged, nor gotten wet, nor been anywhere but in my jacket pocket during the hour I was using it this morning. I would appreciate any thoughts or advice.