The 20GB iPod is part of the classic iPod series. Occasionally, due to hardware malfunctions, the unit can freeze up and stop responding when you attempt to use the device, preventing you from listening to music on the player. You can usually resolve the issue and unlock the iPod by resetting the unit. If that fails to unlock the 20GB iPod, you can restore the unit to original factory settings. Note that restoring the iPod removes any music currently on the system; always attempt to reset the iPod before restoring it. Writer Bio
