![background image](https://i.helpnox.com/iPod classic/en_US/iPod classic_en_US077.png)
U
unlocking iPod screen 54, 64
unresponsive iPod 59
unsupported audio file formats 62
updating and restoring software 65
USB 2.0 port
requirements 64
slow syncing of music or data 62
![background image](https://i.helpnox.com/iPod classic/en_US/iPod classic_en_US078.png)
78
Index
USB port on keyboard 11, 60
Use iTunes to restore message in display 62