And it's back. I had rebooted a few times since I discovered the issue, but yesterday I rebooted again, and it was the first time it rebooted easily without having to coax it to complete the boot process. Sound came back on fully and it is working great for podcasts now. I love my N800, but it is really finicky these days about everything. Need to be very gentle and whisper encouraging things to make sure she'll turn on.