Information in this article applies to iPod touch, iPod shuffle, iPod nano, iPod mini, iPod classic, iPod with video, iPod photo, and 1st through 4th generation iPods.
If your iPod has a Hold switch, before anything else, make sure the switch is in the off position. If the Hold switch is on, your iPod may appear frozen when it's not.
To restart an iPod touch, do a hard reboot. To hard reboot the iPod, press and hold the Sleep/Wake button and the Home button (the power off slider briefly appears while holding the buttons) until you see the Apple logo. This may take at least 10 seconds.