This means that you've got flat battery and you need to plug it in to charge it.
You could try Ejecting the Device from the device Menu
The iPod Nano can be used as a voice recorder. Select Voice Memo from the Extras menu.
If its a nano hold the menu and select button in
To fix a frozen ipod nano hold the "MENU" and CENTRE button. Hold for 5 seconds then release. Your ipod nano will go to the apple symbol then turn back to normal.
hold the middle and the menu button to reset it
keep clicking the menu button until it shows up.
In the main menu, there is a section called Photos.
Yes you can if you have the new iPod nano which takes video, go to extra and select video camera if you cant see it on the main menu
Eject the iPod then it should still be charging then press then press menu then you can listen to your iPod while its charging.
Hold the center button and the menu button for about five seconds.
Hold down the menu and select buttons for a while
If its a nano you hold the menu button and center button which will reset your ipod but keep your music,games etc