Frozen iPod nano

Toggle the "Hold" switch to the "On" position, then "Off." The "Hold" switch is the small sliding switch on the top of the iPod. Move it to the "On" position to show an orange rectangle. Move it back to the "Off" position to show a white rectangle. Hold the "Menu" and "Center" buttons. Press the 2 buttons at the same time for between 8 and 10 seconds. Your screen will go blank and then boot up with a dark Apple icon. The icon eventually turns bright and brings you back to your main menu once the reset is complete. Check your iPod to make sure it plays properly. If the iPod still does not work repeat the reset process. b> Scroll Wheel and Touch Wheel iPods Move the "Hold" switch from "On" to "Off." Press the "Play/Pause" button and the "Menu" button at the same time. Press both buttons together for approximately 6 to 8 seconds. This initiates the self-running reset process. Make sure the reset was successful. If problems persist you may need to perform the reset process once again. b> iPod Nano Move the on-off switch to the "Off" position that shows the green strip. Leave the iPod Nano in this position for 5 seconds. Move the switch back to the "On" position. Use your iPod Nano to make sure the reset worked properly and all your music is intact.
iPod into Diagnostic Mode
http://www.methodshop.com/gadgets/ipodsupport/diagnosticmode/index.shtml

Hold the home button and the power button at the same time and wait until the device shows the Apple logo on your screen (should take around 30 seconds).

I have provided a link related to your problem, use that link to help solve the problem.

http://ipod.about.com/od/troubleshootingyouripod/ht/reset_ipod_nano.htm

Good Luck

hold the center button and the menu button until you see a black screen with the apple logo then wait and see what happens

there are 2 basic ways the harder one is:
leave it on all night until it runs out of power then charge it and it should work

The easy way:

hold the menu and select button down for a while until the apple logo apears, if it dosnt work follow the harder way

THIS WILL SOLVE YOUR PROBLEM!

1.Turn on HOLD then switch it off
2. Press and hold the "Play/Pause" Button and the Center button at the same time until it resets the iPod.

This should reset your iPod and fix your hung (frozen) iPod!!!

your screen seems to be broken.

1 Toggle the Hold switch on and off (set it to Hold, and then turn it off again).
2 Press and hold the Center and Menu buttons for at least 6 seconds, until the
Apple logo appears. this resets the ipod

1. Toggle the Hold switch on and off. (Set it to Hold, then turn it off again.)
2. Press and hold the Menu and Select buttons for at least 6 seconds until the Apple logo appears.
3. When the Apple logo appears, release the Menu and Select buttons and immediately press and hold the Select and the Play/Pause buttons until the Disk Mode screen appears.
4. Connect it to your computer.
5. In iTunes, select Restore to Restore the iPod firmware. This erase everything on the iPod.

This is all I could locate: Reflash it using the updater program or call apple. Also see: http://www.gadgetizer.com/2005/09/12/ipod-nano-updates/