- Try resetting the Bose dock
- Inspect the dock connectors on the iPod and the dock for bent or missing contacts, foreign material, corroded contacts, broken, missing or cracked plastic.
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Reset the Classic. I do not know how to do that.
- Reset all settings
Go to Settings > General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.
- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.