Apple has released a reset utility for its first generation of iPod Shuffles aimed at correcting a number of problems that users may have encountered during use of their shuffles, including:
--With the iPod shuffle switched on, pressing the Play button will cause amber and green LEDs to flash for a few seconds, and the unit will not play any music, nor can you sync music to it from iTunes.
--On a Windows PC, iPod shuffle will appear in My Computer as a Removable Disk, however the iPod shuffle volume will not mount correctly. The unit is listed in Device Manager under Disk Drives as Apple iPod USB Device.
--On a Mac, the unit will only be recognized in Apple System Profiler under Hardware -> USB and will not appear or mount in the Finder.
--When attempting to restore, the unit may not be recognized at all. However, if it is recognized, the restore may fail with an error dialog Firmware update failure. Disk write error or another error. It may take 3 restore attempts before the error appears. Note: iPod shuffle may take several minutes to be recognized.