Try the following:
iPod® troubleshooting
Applies to:
- Make sure to remove any protective cases or covers from your iPod
- Try resetting your iPod. Depending on your model, you should refer to Apple support to perform this task
- Reset your SoundDock system. Unplug the system from power for 60 seconds. Remove the battery. Plug the system in without the battery, and see if the iPod will charge
- Make sure to remove any protective cases or covers from your iPod. Docking your iPod in its case or cover will prevent it from fitting and can also result in no audio