the device is stuck

My Clip Plus got hung up the other day. No amount of holding down buttons and powering on and off would fix it. I would try to start a file and it would play for one second (if that) and then stop. I finally fixed it by formatting with the on-board option–for some reason using format from within Windows Media Player didn’t erase anything–then I resetup syncing and synced files back and now it works again.