I was able to fix the white screen on my player by holding the on/off button in the off position for about 10 full seconds. Once the player turned off I was able to turn it back on as normal, and the white screen was gone. In my case the white screen appears after a specific sequence of events, usually when scrolling the volume button on the FM radio. I have sometimes had to switch to the home screen and select a music file to change the volume, then return to the radio. I'm hoping it's a firmware issue, but I really don't know
New Sansa owner, January 2009