I've been running Rockbox on my e250 for a long time and it's been working great. However, today it quit right in the middle of a song.

The screen is black; I can't get it to power up; plugging it in doesn't wake it up either. It's as if it is 100% completely and forever dead.
Any ideas on getting it to "wake up"? Or should I just pull the SD card and start over with another unit?
Thanks!