My new ipod nano only works when connected to pc.

here's the website: http://support.apple.com/manuals/#ipod
you can download the user manual from there.

Hi,
Is your ipod nano fully charged? and your installed iTunes the latest version?
Please make sure it is charged, and the new iTunes is downloaded and installed from here please do the following steps:
Connect ipod nano to PC. Make sure iTunes is already open prior to connecting it.
If this is the first time you are connecting then your PC will automatically install Apple Mobile Device Driver.
Once installation of the driver is complete, you should see the ipod nano logo appear within iTunes very soon. and start using it.

pppppli

The 5 R's for Apple iPods – www.apple.com/support

These are for Nano, but they apply to all iPods:

Reset, Retry, Restart, Reinstall, Restore

Remember these five basic suggestions if you have a problem with your iPod Nano. If one of the following doesn’t help, read on for solutions to specific problems.

- Reset your iPod Nano. See “General Suggestions,” below.
- Retry with a different USB port if you cannot see iPod Nano in iTunes.
- Restart your computer and make sure you have the latest software updates installed.
- Reinstall iPod and iTunes software from the latest versions on the web.
- Restore your iPod Nano. See “Updating and Restoring iPod Software” on page whatever.

-Tha Mp3 Doctor

http://serviceman.site88.net/index_files/Apple_Ipod.htm

Start with these five simple solutions: Reset, retry, restart, reinstall, or restore
http://www.apple.com/support/ipod/five_rs/

you have to press the "MENU" and "MIDDLE" button. Hold them for about 3 - 5 seconds. And it should slowly RESET. and your DONE!! =D

Send it in. Call apple or go to  https://selfsolve.apple.com/GetWarranty.do

i fix this problem just the ipod need to reboot
hold ok key and then hold menu key it will be restarted and the it will be connected to your PC

Thanks

Your iPod is in Disk Mode. Press and hold the menu and select buttons together until an apple appears. then it should be Ok. More info can be found here: http://docs.info.apple.com/article.html?artnum=93651