In many cases restarting Apple iPods will fix this issue. Do this by toggling the Hold switch on and off. Then press and hold the Menu and Center (Select) buttons simultaneously until the screen flickers and the Apple logo appears. Assuming you have tried that and now need more help you will need to go to the computer. As a general fix all for an iPod you should try a complete Factory restore. This will wipe all the music off of the iPod and then take it back to its original conditions. You can then copy all your songs from iTunes back to the iPod.