I am having a similar problem with my one. There is a screen that allows you to format, load firmware, reboot and clean. None of these options would work in my case but it might be worth your while trying. Be wary about the reload firmware option because if you can't connect to a pc you will be unable to reload the firmware. To get this menu, take out the battery, and while holding the switch in the on position put the battery back in.
Vinny, April 2008